100 Allied The Leading Mathematics 1 Theme III Our Community 101 Figure Telling In digits In words 10 Sticks and 1 Stick 11 Eleven 10 Sticks and 2 Sticks 12 Twelve 10 Sticks and 3 Sticks 13 Thirteen 10 Sticks and 4 Sticks 14 Fourteen 10 Sticks and 5 Sticks 15 Fifteen 10 Sticks and 6 Sticks 16 Sixteen 10 Sticks and 7 Sticks 17 Seventeen 10 Sticks and 8 Sticks 18 Eighteen 10 Sticks and 9 Sticks 19 Nineteen 10 Sticks and 10 Sticks 20 Twenty
102 Allied The Leading Mathematics 1 Theme III Our Community 103 1. Count the sticks and match with the correct numerals. 13 14 17 16 15 19 18 Thirteen Fourteen Fifteen Sixteen Seventeen Nineteen Eighteen Look, Think and Do
102 Allied The Leading Mathematics 1 Theme III Our Community 103 2. Write the following numerals in words. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 4. Write the following numeral names in digits. One Two Three Four Five Six Seven Eight
104 Allied The Leading Mathematics 1 Theme III Our Community 105 Nine Ten Eleven Twelve Thirteen Fourteen Fifteen Sixteen Seventeen Eighteen Nineteen Twenty 3. Fill the letters to complete the numerals in the puzzle. E T S F S X S V E T E N N O Y E
104 Allied The Leading Mathematics 1 Theme III Our Community 105 Look, Think and Tell HinduArabic Numerals Fingers Telling Devanagari Numerals In digits In words 0 d'7L s;]sf] ) z"Go 1 Pp6f cf}Fnf ! Ps 2 b'O6f cf}Fnf @ b'O{ 3 tLgcf]6f cf}Fnf # tLg 4 rf/cf]6f cf}Fnf $ rf/ 5 kfFrcf]6f cf}Fnf % kf“r 6 5cf]6f cf}Fnf ^ 5 7 ;ftcf]6f cf}Fnf & ;ft 8 cf7cf]6f cf}Fnf * cf7 9 gf}Fcf]6f cf}Fnf ( gf}+ 10 bzcf]6f cf}Fnf !) bz 5.2 Devanagari Numerals from ) to @) in Words
106 Allied The Leading Mathematics 1 Theme III Our Community 107 Hindu-Arabic Numerals Sticks Telling Devanagari Numerals In digits In words 11 bz / Ps !! P3f/ 12 bz / b'O{ !@ afx| 13 bz / tLg !# t]x| 14 bz / rf/ !$ rf}w 15 bz / kfFr !% kGw| 16 bz / 5 !^ ;f]x| 17 bz / ;ft !& ;q 18 bz / cf7 !* c7f/ 19 bz / gf}+ !( pGgfO; 20 bz / bz @) aL;
106 Allied The Leading Mathematics 1 Theme III Our Community 107 1. Count the number of sticks and match. pGgfO; rf}w kGw| ;q c7\7f/ ;f]x| t]x| Thirteen Fourteen Fifteen Sixteen Seventeen Nineteen Eighteen Look, Think and Do
108 Allied The Leading Mathematics 1 Theme III Our Community 109 PR OJECT WORK 5 Record the number of members of any seven families in your nearbourhood. Write these numbers in digits and words in the table below in both Hindu-Arabic and Devanagari systems. SN Name of the House owner Number of family members in Digits in Hindu-Arabic and Devanagari systems Number of family members in words in Hindu-Arabic and its Devanagari systems 1. 2. 3. 4. 5. 6. 7.
108 Allied The Leading Mathematics 1 Theme III Our Community 109 NUMBERS FROM 21 TO 100 Chapter 6 Lessons Pages 6.1 Counting Tens 110 6.2 Counting 21 to 50 112 6.3 Counting 51 to 80 116 6.4 Counting 81 to 100 119 Math is Fun 122 6.5 Devanagari Numerals from @! to %) 123 6.6 Devanagari Numerals from %! to !)) 126 Math is Fun 130 6.7 Greater and Smaller Number 131 6.8 After, Before and Between Numbers 133 Project Work – 6 135 v Count, read and write the numerals from 21 to 100 in Hindu-Arabic and Devanagari numeral systems. Learning Outcomes: v Can you ask questions about those pictures ? Warm-Up Instruction: Teachers are requested questions to ask to the students about the above picture and discuss with them.
110 Allied The Leading Mathematics 1 Theme III Our Community 111 Count the number of spots and read tens. Look, Think and Tell 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 8 Tens = 80 9 Tens = 90 Eighty Ninety 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 Tens = 100 Hundred 10 10 10 10 10 10 10 10 10 10 10 10 10 10 3 Tens = 30 4 Tens = 40 10 10 10 10 2 Tens = 20 Twenty Thirty Forty 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 5 Tens = 50 6 Tens = 60 7 Tens = 70 Fifty Sixty Seventy 1 Ten = 10 6.1 Counting Tens
110 Allied The Leading Mathematics 1 Theme III Our Community 111 1 Ten 2 Tens 3 Tens 4 Tens 5 Tens 6 Tens 7 Tens 8 Tens 9 Tens 10 Tens Eighty Thirty Fifty Ninety Ten Forty Twenty Hundred Sixty Seventy 10 20 30 40 50 60 70 80 90 100 1. Match the following. 2. Write the following tens in digits and words. 2 Tens 5 Tens 7 Tens 9 Tens 10 Tens Look, Think and Do
112 Allied The Leading Mathematics 1 Theme III Our Community 113 Look, Think, Tell and Do 10 10 9 9 8 8 7 7 2 2 2 Tens and 1 One = 21 2 Tens and 2 Ones = 22 Twenty one Twenty two 10 10 10 10 1 1 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 3 3 10 10 10 10 4 4 5 5 6 6 1. Count the number of spots and read the numerals. Count the number of spots. Read and write the numerals. 6.2 Counting 21 to 50
112 Allied The Leading Mathematics 1 Theme III Our Community 113 3 Tens and 1 One = 31 3 Tens and 2 Ones = 32 Thirty one Thirty two 2 2 10 10 10 10 10 10 1 1 10 10 10 10 10 10 8 8 7 7 10 10 10 10 10 10 10 10 10 10 10 10 10 10 9 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 3 3 4 4 10 10 10 10 10 10 10 10 10 10 10 10 5 5 6 6 2. Count the number of spots and read the numerals. Count the number of spots. Read and write the numerals. Look, Think, Tell and Do
114 Allied The Leading Mathematics 1 Theme III Our Community 115 4 Tens and 1 One = 41 4 Tens and 2 Ones = 42 Forty one Forty two 2 2 10 10 10 10 10 10 10 10 1 1 10 10 10 10 10 10 10 10 8 8 7 7 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 9 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 3 3 4 4 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 5 5 6 6 3. Count the number of spots and read the numerals. Count the number of spots. Read and write the numerals. Look, Think, Tell and Do
114 Allied The Leading Mathematics 1 Theme III Our Community 115 1. Write the numerals from 1 to 50. 2. Write the following numerals in words. 11 16 22 27 29 33 36 39 41 43 46 48 Look, Think and Do
116 Allied The Leading Mathematics 1 Theme III Our Community 117 Tens Ones Telling Symbol Name 5 1 Fifty and one 51 Fifty one 5 2 Fifty and two 52 Fifty two 5 3 Fifty and three 53 Fifty three 5 4 Fifty and four 54 Fifty four 5 5 Fifty and five 55 Fifty five 5 6 Fifty and six 56 Fifty six 5 7 Fifty and seven 57 Fifty seven 5 8 Fifty and eight 58 Fifty eight 5 9 Fifty and nine 59 Fifty nine 6 0 Sixty and zero 60 Sixty Look, Think and Tell 1. Fill in the banks. 51 59 2. Write the following numerals in words. 52 53 55 57 59 60 Look, Think and Do Read the numerals with tens and ones. 6.3 Counting 51 to 80
116 Allied The Leading Mathematics 1 Theme III Our Community 117 Tens Ones Telling Symbol Name 6 1 Sixty and one 61 Sixty one 6 2 Sixty and two 62 Sixty two 6 3 Sixty and three 63 Sixty three 6 4 Sixty and four 64 Sixty four 6 5 Sixty and five 65 Sixty five 6 6 Sixty and six 66 Sixty six 6 7 Sixty and seven 67 Sixty seven 6 8 Sixty and eight 68 Sixty eight 6 9 Sixty and nine 69 Sixty nine 7 0 Seventy and zero 70 Seventy 7 1 Seventy and one 71 Seventy one 7 2 Seventy and two 72 Seventy two 7 3 Seventy and three 73 Seventy three 7 4 Seventy and four 74 Seventy four 7 5 Seventy and five 75 Seventy five 7 6 Seventy and six 76 Seventy six 7 7 Seventy and seven 77 Seventy seven 7 8 Seventy and eight 78 Seventy eight 7 9 Seventy and nine 79 Seventy nine 8 0 Eighty and zero 80 Eighty Look, Think and Tell Read the numerals with tens and ones.
118 Allied The Leading Mathematics 1 Theme III Our Community 119 2. Write the following numerals in words. 3. Write the missing numerals. 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 1. Write the numerals from 50 to 80. 65 68 73 Look, Think and Do
118 Allied The Leading Mathematics 1 Theme III Our Community 119 Look, Think and Tell Tens Ones Telling Symbol Name 8 1 Eighty and one 81 Eighty one 8 2 Eighty and two 82 Eighty two 8 3 Eighty and three 83 Eighty three 8 4 Eighty and four 84 Eighty four 8 5 Eighty and five 85 Eighty five 8 6 Eighty and six 86 Eighty six 8 7 Eighty and seven 87 Eighty seven 8 8 Eighty and eight 88 Eighty eight 8 9 Eighty and nine 89 Eighty nine 9 0 Ninety and zero 90 Ninety 9 1 Ninety and one 91 Ninety one 9 2 Ninety and two 92 Ninety two 9 3 Ninety and three 93 Ninety three 9 4 Ninety and four 94 Ninety four 9 5 Ninety and five 95 Ninety five 9 6 Ninety and six 96 Ninety six 9 7 Ninety and seven 97 Ninety seven 9 8 Ninety and eight 98 Ninety eight 9 9 Ninety and nine 99 Ninety nine 10 0 Hundred and zero 100 Hundred Read numerals with tens and ones. 6.4 Counting 81 to 100
120 Allied The Leading Mathematics 1 Theme III Our Community 121 2. Write the following numerals in words. 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 1. Write the numerals from 51 to 100. Look, Think and Do
120 Allied The Leading Mathematics 1 Theme III Our Community 121 3. Complete the missing numerals. 51 53 59 63 67 70 85 87 89 91 88 91 96 96 99 94 72 77
122 Allied The Leading Mathematics 1 Theme III Our Community 123 1. Complete the puzzle by filling the missing numerals. 60 26 27 63 34 30 81 43 Maths is Fun 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 41 40 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 62 61 60 59 63 64 65 66 68 67 69 70 71 72 73 75 74 76 77 78 79 80 81 8283 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 23 24 2. Join the numerals from 1 to 100 to complete map of Nepal's.
122 Allied The Leading Mathematics 1 Theme III Our Community 123 Look, Read and Speak 1. Read and write the numerals in digits (no.) in Hindu-Arabic and Devanagari numeral systems. No. Telling Devanagari Numerals In words In digits 21 Twenty and one aL; / Ps PSsfO; @! 22 Twenty and two aL; / b'O{ afO; @@ 23 Twenty and three aL; / tLg t]O; @# 24 Twenty and four aL; / rf/ rf}la; @$ 25 Twenty and five aL; / kfFr klRr; @% 26 Twenty and six aL; / 5 5lAa; @^ 27 Twenty and seven aL; / ;ft ;QfO; @& 28 Twenty and eight aL; / cf7 c6\7fO; @* 29 Twenty and nine aL; / gf} pglGt; @( 30 Thirty and zero tL; / z"Go tL; #) 31 32 33 6.5 Devanagari Numerals from @! to %)
124 Allied The Leading Mathematics 1 Theme III Our Community 125 No. Telling Devanagari Numerals In words In digits 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
124 Allied The Leading Mathematics 1 Theme III Our Community 125 5ofln; t]O; Psrfln; c7\lt; rf}Flt; alQ; ;QfO; 50 krf; 32 27 41 34 38 46 23 @# @& #@ #$ #* $! $^ %) rf}jfnL; c6\7fO; t]lQ; ;t\rfln; PSsfO; Pslt; klRr; pgGrf; pgGrfnL; aofln; Forty two Twenty one Twenty eight Forty seven Forty four Twenty five Thirty three Thirty nine Forty nine @! Thirty one @% @* #! ## #( $@ $$ $& $( 1. Match the following. 2. Match the following. Look, Think and Do
126 Allied The Leading Mathematics 1 Theme III Our Community 127 Look, Read and Speak 1. Read and write the numerals in digits (no.) in Hindu-Arabic and Devanagari numeral system. No. Telling Devanagari Numerals In words In digits 51 Fifty and one krf; / Ps PsfpGg %! 52 Fifty and two krf; / b'O{ afpGg %@ 53 Fifty and three krf; / tLg lqkGg %# 54 Fifty and four krf; / rf/ rf}jGg %$ 55 Fifty and five krf; / kfFr krkGg %% 56 Fifty and six krf; / 5 5kGg %^ 57 Fifty and seven krf; / ;ft ;GtfpGg %& 58 Fifty and eight krf; / cf7 cG7fpGg %* 59 Fifty and nine krf; / gf} pGg;f7L %( 60 Sixty and zero ;f7L / z"Go ;f7L ^) 61 Ps;6\7L ^! 62 63 6.6 Devanagari Numerals from %! to !))
126 Allied The Leading Mathematics 1 Theme III Our Community 127 No. Telling Devanagari Numerals In words In digits
128 Allied The Leading Mathematics 1 Theme III Our Community 129 No. Telling Devanagari Numerals In words In digits !))
128 Allied The Leading Mathematics 1 Theme III Our Community 129 ;t;6\7L pgfGgAa] cG7fgAa] rf}jGg pgG;f7L krxQ/ lq;6\7L rf}/f;L 84 54 75 98 59 63 89 67 %$ %( ^# ^& &% *$ *( (* ;tf;L ;GtfpGg Psf;L ;txQ/ PsxQ/ pgfG;Q/L Ps;6\7L kGrfgAa] PsfGgAa] ;o Ninety one Sixty nine Sixty one Eighty one Seventy one Seventy Seven Ninety five Hundred Eighty seven Fifty seven %& ^! ^( &! && *! *& (! (% !)) 1. Match the following Hindu-Arabic with Nepali numerals. 2. Match the following. Look, Think and Do
130 Allied The Leading Mathematics 1 Theme III Our Community 131 Maths is Fun Make a team of four students and taloe a spot every one. Throw a dice simultaneously and move the spot according as the points on the dics. When you do good works, move by the ladder when you do wrong move by the sliding.
130 Allied The Leading Mathematics 1 Theme III Our Community 131 Look, Think and Learn Which is greater or smaller numeral between 47 and 44 ? Which is greater or smaller numeral between 35 and 42 ? and Greater Greater Smaller Smaller 7 ones is greater than 4 ones. So, 47 is greater than 44. 4 ones is smaller than 7 ones. So, 44 is smaller than 47. 3 tens is smaller than 4 tens. So, 35 is smaller than 42. 4 tens is greater than 3 tens. So, 42 is greater than 35. 35 42 and Greater Smaller Equal 47 44 1. Count the blocks and fill the numerals in the boxes. is greater than is smaller than and a. Look, Think and Do 6.7 Greater and Smaller Numbers
132 Allied The Leading Mathematics 1 Theme III Our Community 133 2. Tick (µ) the greater numerals. 78 80 77 89 85 82 87 89 93 96 91 90 65 68 61 70 36 42 52 51 42 55 92 85 75 57 65 25 60 65 62 80 82 3. Tick (µ) the smaller numerals. 42 35 37 52 49 55 82 85 92 65 63 92 94 85 87 72 75 is greater than is smaller than is greater than is smaller than and b. and c.
132 Allied The Leading Mathematics 1 Theme III Our Community 133 Look, Think and Learn 47 is one more than 46. 46 is one more than 45. 46 comes just before 47. 46 comes just after 45. 46 comes in between 47 and 45. 45 46 47 1. Write the numerals that come just before, just after and in between. comes just before . comes just after . comes in between and . comes just before . comes just after . comes in between and . 23 24 25 56 57 58 a. b. comes just before . comes just after . comes in between and . comes just before . comes just after . comes in between and . 75 76 77 87 88 89 c. d. comes just before . comes just after . comes in between and . comes just before . comes just after . comes in between and . 98 99 100 51 52 53 e. f. Left Smaller Greater Right Look, Think and Do 6.8 After, Before and Between Numbers
134 Allied The Leading Mathematics 1 Theme III Our Community 135 2. What numeral comes just before: 3. What numeral comes just after: 4. What is the numeral in between: 5. Which numerals comes before and after: 56 92 99 36 74 60 69 89 55 98 75 65 82 92 95 35 87 89 69 71 97 99 62 64 78 80 59 61 50 53 39 41 85 73 65 90 70 63 82 53
134 Allied The Leading Mathematics 1 Theme III Our Community 135 PR OJECT WORK 6 Record the number of boys and girls students of the classes 1, 2 and 3. Write these numbers in digits and words in the table below on both Hindu-Arabic System (HAS) and Devanagari System (DS). Class Students Number of students in Digits of HAS and DS Number of students in words of HAS and DS 1. Boys Girls Total 2. Boys Girls Total 3. Boys Girls Total
136 Allied The Leading Mathematics 1 Theme III Our Community 137 EVEN AND ODD NUMBERS Chapter 7 Lessons Pages 7.1 Pair Objects 137 7.2 Concept of Even Numbers 139 7.3 Concept of Odd Numbers 140 7.4 Identifying Even and Odd Numbers 142 7.5 Even and Odd Numbers 144 Project Work – 7 145 v Classify odd and even numbers up to 20 by using solid objects. Learning Outcomes: v Can you ask questions about the above pictures ? v How many planets are there in the solar system ? Can you count the number of stars in the sky ? v How many members are there in the big family? How many couples are there? How many dogs are there? Are they in couple? v How many fishes are there in the pond of the apple garden? How many apples are on each tree? Are the all in pair? Warm-Up Instruction: Teachers are requested to ask question to the students about the above picture and discuss with them.
136 Allied The Leading Mathematics 1 Theme III Our Community 137 Look, Think and Tell 2 persons ⇒ 1 pair 2 sheep ⇒ 1 pair 2 Friends ⇒ 1 pair 2 hens ⇒ 1 pair 2 cats ⇒ 1 pair 2 plants ⇒ 1 pair 2 lungs ⇒ 1 pair 2 flowers ⇒ 1 pair 2 eyes ⇒ 1 pair 2 cups ⇒ 1 pair 2 birds ⇒ 1 pair 2 mobiles ⇒ 1 pair a. c. e. b. d. f. g. i. k. h. j. l. 7.1 After, Before and Between Numbers
138 Allied The Leading Mathematics 1 Theme III Our Community 139 1. Circle the objects in pair with the same colour. Then write their names in the table below them. Look, Think and Do
138 Allied The Leading Mathematics 1 Theme III Our Community 139 An even number can be separated with two objects in each group. 1. Make a pair of the objects. Tick () if it is even number and cross (×) if it is not even. 2 strawberries (pair) 2 strawberries (pair) 2 strawberries (pair) 6 strawberries Look, Think and Tell 8 5 How many strawberries are there? How many pairs of strawberries are formed? 3 pairs of strawberries Look, Think and Do a. 7 c. 6 e. b. 10 d. 9 f. 7.2 Concept of Even Numbers 2. Circle the even numbers. 1 2 3 4 5 6 7 8 9 10
140 Allied The Leading Mathematics 1 Theme III Our Community 141 An odd number cannot be separated into groups of objects by two. How many mice are there? How many pairs of mice are formed? 1. Make the pair of objects. Tick () if it is odd number and cross (×) if it is not odd. 7 4 5 6 3 9 5 mice 2 mice (pair) 2 mice (pair) 1 mouse (not pair) Look, Think and Tell 2 pairs and 1 mouse Look, Think and Do a. c. e. b. d. f. 7.3 Concept of Odd Numbers
140 Allied The Leading Mathematics 1 Theme III Our Community 141 2. Circle and colour the odd numbers. 1 2 3 4 5 6 7 8 9 10 h. j. l. n. p. g. i. k. m. o.
142 Allied The Leading Mathematics 1 Theme III Our Community 143 4 even number 5 odd number 10 even number 1. Round objects in pair and write even or odd numbers. 12 Even number ______________ ______________ ______________ ______________ ______________ Look, Think and Tell ______________ ______________ ______________ Look, Think and Do a. d. g. b. e. h. c. f. i. 7.4 Identifying Even and Odd Numbers
142 Allied The Leading Mathematics 1 Theme III Our Community 143 2. Separate the odd and even numbers. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Odd Numbers Even Numbers 3. List the even numbers from 1 to 20. 4. List the odd numbers from 1 to 20. ______________ ______________ ______________ j. k. l.
144 Allied The Leading Mathematics 1 Theme III Our Community 145 6 Even number Horizontal line test 7 Odd number There are equal number of balls up and down of the horizontal line. There are not equal number of balls up and down of the horizontal line. Look, Think and Tell 8 Even number 13 Vertical line test Odd number 18 Even number 14 Even number 1. Write even or odd numbers by vertical line test. Look, Think and Do a. d. b. e. c. f. 7.5 Even and Odd Numbers by Lines
144 Allied The Leading Mathematics 1 Theme III Our Community 145 PR OJECT WORK 7 2. Write even or odd numbers by horizontal line test. g. j. a. c. e. g. b. d. f. h. h. k. i. l. Count the number of one dozen utensils found at your home. Write these numbers in the table below. Identify these numbers as odd or even.
146 Allied The Leading Mathematics 1 Theme III Our Community 147 ADDITION UP TO 20 Chapter 8 Lessons Pages 8.1 Adding by 1 by Using Solid Objects 147 8.2 Adding by 2 by Using Solid Objects 151 8.3 Addition of 3 153 8.4 Addition of 4 155 8.5 Addition of 5 157 8.5 Addition Table with Sum up to 10 160 8.7 Horizontal and Vertical Addition 163 Maths Lab Activities 165 Fun with Math 166 8.8 Word Problems Sum up to 10 167 8.9 Addition up to 13 168 8.10 Addition up to 16 170 8.11 Addition up to 18 172 8.12 Addition up to 20 174 Fun Math Activities 176 8.11 Addition Table of Sum up to 20 177 8.14 Word Problems Sum up to 20 179 Project Work – 8 180 v Add up to three numbers whose sum is up to 20. Learning Outcomes:
146 Allied The Leading Mathematics 1 Theme III Our Community 147 How many potatoes are there on the plate with the daughter? i Nothing. It means zero potato. Mother adds one potato on the plate. How many potatoes are there on the plate? i There is only one. The plate has one potato. There is not added any potato in it. How many total potatoes does it have ? i It has only one potato. 0 potato + 1 potato = 1 potato 1 potato + 0 potato = 1 potato Addition by zero does not affect the previous number. A boy has Re. 1. His father gives Re. 1 to him. How much Rupees does he have? 1 + 1 = 2 How many puppies are there ? One puppy is mixed with them. How many puppies are there now ? 2 + 1 = 3 Look, Think, Learn and Do a. b. 8.1 Adding 1 by Using Solid Objects
148 Allied The Leading Mathematics 1 Theme III Our Community 149 How many pencils are there on the book ? One more pencil is added on it. How many pencils are there on the book now ? 3 + 1 = 4 How many pencils are there in the case ? A student adds one pencil in it. How many pencils are there altogether ? 4 + 1 = 5 How many pencils are there in the case ? A student adds one pencil in it. How many pencils are there altogether ? 5 + 1 = 6 How many pencils are there in the case ? A student adds one pencil in it. How many pencils are there altogether ? 6 + 1 = 7 c. d. e. f.
148 Allied The Leading Mathematics 1 Theme III Our Community 149 How many pencils are there in the case ? A student adds one pencil in it. How many pencils are there altogether ? 7 + 1 = 8 How many pencils are there in the case ? A student adds one pencil in it. How many pencils are there altogether ? 8 + 1 = 9 How many pencils are there in the case ? A student adds one more pencil in it. How many pencils are there altogether ? 9 + 1 = 10 How many pencils are there in the case ? A student adds two pencils in it. How many pencils are there altogether ? 8 + 2 = 10 g. h. i. j.
150 Allied The Leading Mathematics 1 Theme III Our Community 151 1. Add the bananas and write the numerals in the boxes. Look, think and Learn = 2 + 1 = 3 + = + = + = + = + = + = + = + = + = + = How can we find it ? For this, we add 2 and 1 . i.e. 2 + 1 = ? Ram puts 2 spoons and Sita puts 1 spoon on the plate. How many spoons are there on the plate? Look, Think and Do a. c. e. g. i. b. d. f. h. g.