Acme Mathematics 1 151Activity1. Colour the pond and leaf.867131012519918141611 202. Help the frog to leap onto a leaf that has a number 2 greater than the number on the leaf the frog is sitting on.Project Work Order of Numbers
152 Acme Mathematics 1ActivityWrite the correct numbers in the blank spaces.4 +81612510Project Work To know the operation : Addition6
Acme Mathematics 1 1531. Objective: To know the use of measurement.2. Materials required:• A-4 size paper• Sticker / Pictures of the objects.• Glue• Scissors3. Activity:• Collect the pictures of 10 objects which you use.• Discuss with your friend and guess the length in cubit.4. An example is given below:It is about 4 cubit.Project Work
154 Acme Mathematics 11. Write in words : 892. Write the number : Seventy seven3. Read the abacus and write the number.Do the following:4. What comes after 49?5. Write the place value of 2 in 29.6. ^) nfO{ cIf/df n]Vg'xf];\\ .7. Circle the 'even' numbers : 11 15 16 178. Circle the odd numbers : 10 13 20 18T O54. Tick ( ) the long and cross ( ) the short objects:54. Tick ( ) the long and cross ( ) the short objects:10. Tick () the long and cross (x) the short object:9. Complete the number line.95 98Our CommunityMixed Exercise
Acme Mathematics 1 15512. Use the symbol >, = or <.(a) 20 21 (b) 89 92(c) 50 50 (d) 63 5713. tn lbOPsf cª\\snfO{ cIf/df n]Vg'xf];\\ Ma. &^ b. *%14. Add the number and write in the circle.5+2 +3 +2 +515. Express in place value chart and write in word : 9916. Rearrange in increasing order : 62, 51, 65, 53, 4317. Rearrange in decreasing order : 75, 80, 66, 83, 8618. Measure the length of the following objects by using your hand span and fill in the box:Bench hand spanTable hand spanQuestion paper hand spanBlack board. hand span11. Write the numbers in between.38, ____, ____, ____, ____, 43
156 Acme Mathematics 14.1 Ordinal Number4.2 Addition of 2-digit Numbers4.3 Subtraction of Numbers• Subtraction of Numbers Using the Objects (up to 20)• Subtraction of 2-digit NumbersOURSCHOOLTHEME4 Weightage : 37 hours
Acme Mathematics 1 157Go outside and make group of 10 students. Conduct a race competition from each group and fill in the table given below.Group A Group BFirst FirstSecond SecondThird ThirdFourth FourthFifth FifthSixth SixthSeventh SeventhEighth EighthNinth NinthTenth TenthActivity4.1 Ordinal Numbers
158 Acme Mathematics 1first1stthird3rdfifth5thsixth6theighth8thninth9thtenth10thsecond2ndfourth4thseventh7thLook at the following queue:Here, in the above picture Surabi is in the first position in queue. Ram is in the second position in queue. Rishi is in the third position in queue. Husen, Hari, Rajan, Gita, Pasang, Biru and Janak are in the fourth, fifth, sixth, seventh, eighth, ninth and tenth position in queue respectively.First (1st), second (2nd), third (3rd), fourth (4th), fifth (5th) sixth (6th), seventh (7th), eighth (8th), ninth (9th), tenth (10th), Eleventh (11th), .......... and so on are called ordinal numbers. These numbers represent the position of objects.Surabi Ram Rishi Husen Hari Rajan Gita Pasang Biru Janak1. Fill in the blanks from the above information :a. Who is in the 8th position?b. Who is in the 4th position?c. Who is in the 6th position?Exercise 4.1
Acme Mathematics 1 1591st 2nd3rd 4th 6th10th9th 8th5th7thd. Who is in the 9th position?e. Who is in the 7th position?f. Who is in the 5th position?2. Complete the table:1 First 1st 59 23 84 610 73. Colour the balloon given below :a. First, second and third in green colour.b. Fourth fifth and sixth in red colour.c. Seventh and eighth in blue colour.d. Ninth and tenth in yellow colour.
160 Acme Mathematics 14. Write the position of the animal in the figure.5. List the names of the students in your class from class 1st to class 10th.............................. ............................. ............................. ............................. ............................. ............................. ............................. ............................. ............................. .............................6. Write your position in the class.......................................................Deer : ......................Ostrich : ......................Rabbit : ......................Dog : ......................
Acme Mathematics 1 161Way to Make 505 10 15 20 25 30 20 25 30 35 40 455 + ........... = 5010 + ........... = 5015 + ........... = 5035 + ........... = 5040 + ........... = 5045 + ........... = 5020 + ........... = 5025 + ........... = 5030 + ........... = 5030 + ........... = 5035 + ........... = 5040 + ........... = 50Complete the following addition.Activity4.2 Addition of 2-digit Numbers
162 Acme Mathematics 1A. Addition of 2-digit numbers without carryingLet us add 36 and 42Step 1 : Write the numbers in a place value chart.Step 2 : Add the ones first together. 6 ones + 2 ones = 8 onesWrite 8 in ones' columnStep 3 : Then, add tens together.3 tens + 4 tens = 7 tensWrite 7 in tens column.(a) 10 + 30 = (b) 20 + 20 =(c) 40 + 50 = (d) 10 + 60 =(e) 30 + 70 = (f) 80 + 10 =(g) 60 + 40 = (h) 50 + 50 =(i) 20 + 70 = (j) 100 + 0 =3 6+ 4 28Tens Ones3 3+ 4 47 8Tens Ones1. Fill the boxes.Classwork40
Acme Mathematics 1 163(a) 65 + 3 = (b) 35 + 5 =(c) 93 + 7 = (d) 83 + 5 =(e) 33 + 7 = (f) 77 + 3 =(g) 11 + 9 = (h) 54 + 6 =(i) 27 + 3 = (j) 45 + 5 =2. Complete the sum.1. Add the following :2 4+ 5 5T O5 4+ 4 5T O1 3+ 3 5T O3 3+ 6 5T O3 2+ 2 1T O3 1+ 4 6T O4 2+ 3 5T O2 3+ 1 5T OExercise 4.2
164 Acme Mathematics 12. Count the blocks and fill in the box.+ =+ =+ =+ =+ =+ =+ =+ =70 23 93
Acme Mathematics 1 165T O T O T O45 + 32 =T O T O T O56 + 22 =T O T O T O18 + 71 =T O T O T O34 + 62 =T O T O T O61 + 18 =T O T O T O30 + 42 =T O T O40 + 60 =H T OT O T O T O47 + 51 =3. Study the abacus and add the following:
166 Acme Mathematics 14. Add the following Add 60 and 20.60 = 6 tens+ 20 = + 2 tens80 = 8 tens8 0+105 0+206 0+201 0+707 0+105 0+105 0+401 0+301 0+603 0+603 0+304 0+304 0+201 0+205 0+303 0+301 0+105 0+408 0+102 0+70
Acme Mathematics 1 1675. Add the following 2 tens + 5 ones+ 4 tens + 3 ones6 tens + 8 ones=2 5+436 87 tens + 4 ones+ 2 tens + 1 one tens + ones=7 4+21a7 tens + 6 ones+ 2 tens + 1 one tens + ones=7 6+21c2 tens + 5 ones+ 6 tens + 3 ones tens + ones=2 5+63b3 tens + 7 ones+ 4 tens + 2 ones tens + ones=3 7+42d4 tens + 5 ones+ 1 ten + 2 ones tens + ones=4 5+12e
168 Acme Mathematics 14 tens + 5 ones+ 3 tens + 4 ones tens + ones=4 5+34f1 ten + 5 ones+ 7 tens + 3 ones tens + ones=1 5+73h7 tens + 4 ones+ 1 ten + 2 ones tens + ones=7 4+12g5 tens + 3 ones+ 3 tens + 6 ones tens + ones=5 3+36i2 tens + 7 ones+ 3 tens + 2 ones tens + ones=2 7+32j8 tens + 3 ones+ 1 ten + 4 ones tens + ones=8 3+14k
Acme Mathematics 1 1696. Add by forward counting46 + 6Count after 46 → 47 → 48 → 49 → 50 → 51 → 5246 + 6 = 5284 + 5Count after 84 → → → → →84 + 5 = 48 + 3Count after 48 → → →48 + 3 = 67 + 4Count after 67 → → → →67 + 4 = 79 + 4Count after 79 → → → →79 + 4 = 95 + 5Count after 95 → → → → →95 + 5 = 1 1 1 1 1 1
170 Acme Mathematics 17. Add the following and tick the correct answer.33 32 34 22 + 1042 43 44 34 + 1051 52 53 43 + 1065 66 67 56 + 1076 77 78 68 + 1085 86 87 75 + 1096 97 98 87 + 10
Acme Mathematics 1 1718. Add on the number lines as shown and write answer in the box.32 33 34 35 36 37 38 39 40 4133 + 6 = 65 66 67 68 69 70 71 72 73 7468 + 5 = 86 87 88 89 90 91 92 93 94 9586 + 8 = 53 54 55 56 57 58 59 60 61 6253 + 9 = 91 92 93 94 95 96 97 98 99 10093 + 7 = 44 45 46 47 48 49 50 51 52 5345 + 7 = 521 1 1 1 1 1 1 → 7 steps
172 Acme Mathematics 125 26 27 28 29 30 31 32 33 34 35 36 37 38 3927 + 12 = 65 66 67 68 69 70 71 72 73 74 75 76 77 78 7966 + 11 = 76 77 78 79 80 81 82 83 84 85 86 87 88 89 9076 + 14 = 54 55 56 57 58 59 60 61 62 63 64 65 66 67 6856 + 10 = 83 84 85 86 87 88 89 90 91 92 93 94 95 96 9784 + 13 = 37 38 39 40 41 42 43 44 45 46 47 48 49 50 5138 + 11 = 81 82 83 84 85 86 87 88 89 90 91 92 93 94 9581 + 14 =
Acme Mathematics 1 1739. Add the following numbers :Add 43 and 35.Write the given numbers, one under the other (column wise)Hence, the sum of 43 and 35 is 78Adding the ones digits, 3 + 5 = 8Adding the tens digits, 4 + 3 = 74 3+357 85 3+253 2+377 1+132 1+514 1+185 2+234 0+371 9+601 5+341 4+342 3+328 2+153 5+446 3+265 7+21
174 Acme Mathematics 110. Expand the followings :11. Add the following :43 4 tens + 3 ones7 tens + 2 ones 72226 tens + 3 ones671 ten + 9 ones797 tens + 5 ones924 tens + 8 ones548 tens + 7 ones286 tens + 6 ones378 tens + 1 one125 tens + 7 ones855 tens + 4 ones862 tens + 9 ones419 tens + 8 ones
Acme Mathematics 1 1750 - 50 Red51 - 99 orange12. Add and colour by the colour code.Colour Code10+ 435317+ 1166+ 1244+ 5233+ 1375+ 20 16+ 3028+ 1052+ 3739+ 4010+ 23 21+ 2426+ 4334+ 61
176 Acme Mathematics 113. Solve the following verbal problems.Bonnie, the bear ate 52 fishes on Sunday and 26 on Monday. How many fishes did he eat altogether?5 2 fishes+ 2 6 fishesTotal 7 8 fishesThere were 66 girls in a school-A and 33 girls in a school-B. How many girls were there in all ?A cat killed 72 rats on a day and 26 rats were killed in the next day. How many rats did he kill altogether?7 2 rat+ 2 6 ratTotalIn a ludo game, Rupak scored36 points in the first try, 32 in the second and 31 in the third. How much did he score altogether?In a cricket match, Suman scored 51 runs, Sansar scored 38 and Puspa scored 10. How many runs did they score altogether?A wrestler ate 14 bowls of rice on Friday, 12 on Saturday and 13 on Sunday. How many bowls of rice did he eat altogether?
Acme Mathematics 1 17714. Add the following number and colour the carrot:2112+111123+11222+253213+ 2 13 22+111212+211112+221420+121512+211020+14Colour green part : 44, 45, 46Colour yellow part : 47, 48, 49 20 + 11 + 16 = 16 + 22 + 10 =
178 Acme Mathematics 173379936 7583249778 538584 4928556815. Add and colour the spot with matching sum.1 6+206 7+111 3+113 4+214 0+434 2+313 1+534 7+501 2+563 7+121 0+184 3+322 5+602 0+337 0+291 3+24
Acme Mathematics 1 1799 + 1 6 + 4 2 + 6 2 + 2 2 + 64 + 4 4 + 6 2 + 8 1 + 9 4 + 46 + 2 7 + 3 6 + 4 8 + 2 4 + 15 + 5 2 + 8 8 + 1 0 + 9 6 + 26 + 4 9 + 1 10 + 0 4 + 416. Find the way to sum 10 and get the pencil.17. Choose the number. Put in the correct box and make the sum 50.Hint : Use the following numbers :5 9 10 15 16 17 20 255040302535 4541333416
180 Acme Mathematics 1A. Subtraction of Numbers Using the ObjectsSubtract the following.8 – 3 = 510 – 5 = 5 – 3 = 11 – 4 = 9 – 6 = 12 – 7 = 7 – 1 = 17 – 11 = 6 – 2 = 10 – 8 = 8 – 7 = 15 – 9 = Classwork4.3 Subtraction of Numbers
Acme Mathematics 1 1811. Subtract and match the correct answer.10 – 1 510 – 2 310 – 3 610 – 4 810 – 5 910 – 6 710 – 7 210 – 8 4Exercise 4.3
182 Acme Mathematics 12. Subtract and circle the correct number.7 – 2 5 – 1 4 – 4 8 – 3 2 – 1 = 4 5 6= 2 3 4= 0 1 2= 4 5 6= 0 1 23. Subtract and write the correct number in the box.5 – 1 =7 – 1 =8 – 1 =7 – 2 =3 – 1 =6 – 1 =1 – 0 =8 – 3 =5 – 2 =6 – 2 =5 – 3 =6 – 3 =3 – 2 =9 – 1 =8 – 2 =
Acme Mathematics 1 1834. Jump along the number line and write the correct number in the boxes.0 1 2 3 4 5 6 7 8 9 10Start from 7 and jump back 2 steps. 7 – 2 =0 1 2 3 4 5 6 7 8 9 10Start from 8 and jump back 3 steps. – =0 1 2 3 4 5 6 7 8 9 10Start from 9 and jump back 3 steps. – =0 1 2 3 4 5 6 7 8 9 10Start from 9 and jump back 4 steps. – =0 1 2 3 4 5 6 7 8 9 10Start from 7 and jump back 4 steps. – =0 1 2 3 4 5 6 7 8 9 10Start from 10 and jump back 4 steps. – =0 1 2 3 4 5 6 7 8 9 10Start from 10 and jump back 5 steps. – =
184 Acme Mathematics 15. Find the difference using the number line.0 1 2 3 4 5 6 7 8 9 109 – 3 =0 1 2 3 4 5 6 7 8 9 106 – 4 =0 1 2 3 4 5 6 7 8 9 108 – 6 =0 1 2 3 4 5 6 7 8 9 105 – 4 =0 1 2 3 4 5 6 7 8 9 107 – 3 =6. Fill in the missing sign.7. Complete the subtraction table.6 3 = 9 20 1 = 19 5 5 = 103 8 = 11 18 3 = 15 8 3 = 118 4 = 12 15 3 = 18 5 5 = 104 2 = 6 10 8 = 18 9 5 = 14– 9 3 6151112– 8 5 7121614
Acme Mathematics 1 1858 – = 81819101620123479967538741189111210––––––==================7 – = 34 – = 3 8 – = 4– 3 = 2 – 5 = 4– 6 = 2 – 1 = 7 5 – = 1 2 – = 0 9 – = 5 6 – = 4 – 2 = 7 – 3 = 69. Complete the subtraction.8. Fill in the missing numbers.
186 Acme Mathematics 110. Add and subtract the number and match with the same number.5 + 3 = = 7 – 42 + 0 = = 9 – 04 + 5 = = 8 – 26 – 5 = = 4 + 62 + 1 = = 1 + 64 + 2 = = 7 – 27 + 3 = = 7 – 52 + 2 = = 9 – 84 + 3 = = 9 – 11 + 4 = = 9 – 588
Acme Mathematics 1 18711. Add or subtract the number using the number line and fillin the box.0 1 2 3 4 5 6 7 8 9 10 5 + = 100 1 2 3 4 5 6 7 8 9 10 8 + = 100 1 2 3 4 5 6 7 8 9 10 10 – 5 =0 1 2 3 4 5 6 7 8 9 10 7 + = 100 1 2 3 4 5 6 7 8 9 10 10 – 2 =0 1 2 3 4 5 6 7 8 9 10 10 – 1 =0 1 2 3 4 5 6 7 8 9 10 10 – 4 =0 1 2 3 4 5 6 7 8 9 10 10 – 6 =0 1 2 3 4 5 6 7 8 9 10 4 + = 100 1 2 3 4 5 6 7 8 9 10 9 + = 100 1 2 3 4 5 6 7 8 9 10 6 + = 100 1 2 3 4 5 6 7 8 9 10 10 – 3 = 71 1 1
188 Acme Mathematics 112. Add or subtract and complete the puzzle table.3+ 2 – 1 + 5– 2+ 2 – 4 + 3– 1– 6+ 9
Acme Mathematics 1 189B. Subtraction of 2-digit numbers (without borrowing)2+3 6–1 8–39–65–45–27–1 5–11+24+32+11+61+33+14+22+42+22+51+53+35+16–56–46–38–78–69–88–28–57–27–69–49–79–59–39–21+4 4+1 3+2Add or subtract and colour the picture as per colour code.Colour Code1234567Activity
190 Acme Mathematics 1T O2 3 – 1 11 2I bought 23 pieces of buns. I ate 11 of them. How many buns do I have ?Always subtract the smaller number from the bigger number. So, you have 12 pieces of buns.(a) 30 – 10 = (b) 29 – 9 =(c) 50 – 7 = (d) 65 – 5 =(e) 74 – 4 = (f) 89 – 9 =(g) 61 – 1 = (h) 43 – 3 =(i) 18 – 8 = (j) 36 – 5 =1. Fill the boxes.Classwork20
Acme Mathematics 1 191(a) 65 – 3 = (b) 36 – 5 =(c) 93 – 7 = (d) 83 – 5 =(e) 33 – 7 = (f) 77 – 3 =(g) 11 – 9 = (h) 54 – 6 =(i) 27 – 3 = (j) 49 – 7 =1. Write the difference in the box.T O3 8 – 2 1T O8 9 – 2 7T O9 5 – 3 4T O8 7 – 6 2T O8 7 – 2 3T O7 4 – 3 0T O3 6 – 1 5T O8 9 – 2 9T O9 3 – 5 1T O3 6 – 2 41. Subtract the following :Exercise 4.4
192 Acme Mathematics 12. Count on the abacus and write the answer in the box:T O75 – 21 = 54T O86 – 34 =T O59 – 14 =T O65 – 45 =T O87 – 36 =T O95 – 35 =T O48 – 23 =T O72 – 51 =T O47 – 33 =T O99 – 25 =T O57 – 15 =T O68 – 32 =
Acme Mathematics 1 1933. Subtract the following by crossing the block.66 – 10 = 47 – 3 = 98 – 12 = 82 – 12 = 55 – 4 = 23 – 3 = 76 – 11 = 16 – 13 =
194 Acme Mathematics 14. Subtract the following numbers :Subtract 32 from 57.5 7– 3 22 557 = 5 tens and 7 ones.32 = 3 tens and 2 onesSubtract the ones digits, 7 – 2 = 5Subtract the tens digits, 5 – 3 = 28 3–416 5–318 6–549 6–258 9–633 9–174 5–226 4–128 8–319 5–215 6–418 7–543 4–236 0–206 9–327 5–149 8–458 8–137 8–529 5–616 5–439 9–897 4–438 6–564 9–24
Acme Mathematics 1 1955. Subtract the following :4 tens + 7 ones– 3 tens + 2 ones1 tens + 5 ones=4 7–321 59 tens + 6 ones– 4 tens + 3 ones tens + ones=9 6–43a9 tens + 8 ones– 4 tens + 2 one tens + ones=9 8–42c4 tens + 7 ones– 2 tens + 5 ones tens + ones=4 7–25b5 tens + 9 ones– 3 tens + 8 ones tens – ones=5 9–38d6 tens + 7 ones– 1 ten + 2 ones tens + ones=6 7–12e
196 Acme Mathematics 16 tens + 7 ones– 3 tens + 4 ones tens + ones=6 7–34f3 ten + 8 ones– 1 ten + 3 ones tens + ones=3 8–13h9 tens + 6 ones– 7 tens + 4 ones tens + ones=9 6–74g7 tens + 5 ones– 3 tens + 4 ones tens + ones=7 5–34i7 tens + 2 ones– 3 tens + 2 ones tens + ones=7 2–32j3 tens + 8 ones– 1 ten + 4 ones tens + ones=3 8–14k
Acme Mathematics 1 1976. Subtract by backward counting :64 – 5Count backward from 6464 – 5 = 59 59 ← 60 ← 61 ← 62 ← 63 ← 6489 – 5Count backward from 8989 – 5 = ← ← ← ← ←67 – 5Count backward from 6767 – 5 = ← ← ← ← ←74 – 4Count backward from 7474 – 4 = ← ← ← ←26 – 3Count backward from 2626 – 3 = ← ← ←89 – 6Count backward from 8989 – 6 = ← ← ← ← ← ←
198 Acme Mathematics 17. Subtract using number line as shown :56 57 58 59 60 61 62 63 64 6564 – 7 = 5739 40 41 42 43 44 45 46 47 4847 – 6 = 73 74 75 76 77 78 79 80 81 8280 – 5 = 55 56 57 58 59 60 61 62 63 6463 – 8 = 82 83 84 85 86 87 88 89 90 9191 – 9 = 91 92 93 94 95 96 97 98 99 100100 – 7 =
Acme Mathematics 1 1998. Subtract using number line as shown :74 75 76 77 78 79 80 81 82 83 84 85 86 87 8886 – 11 = 7537 38 39 40 41 42 43 44 45 46 47 48 49 50 5151 – 14 = 50 51 52 53 54 55 56 57 58 59 60 61 62 63 6463 – 13 = 83 84 85 86 87 88 89 90 91 92 93 94 95 96 9795 – 12 = 62 63 64 65 66 67 68 69 70 71 72 73 74 75 7674 – 10 = Sujan, can you subtract 11 from 86.Of course Ritu, First I will draw a number line. It makes easy to subtract.From 86 count up to the 11 units backwards, which is 75.1 1 1 1 1 1 1 1 1 1 1
200 Acme Mathematics 19. Subtract the following :3 5–258 6–357 5–135 8–514 1–117 9–777 5–439 7–174 3–228 5–456 7–239 3–525 9–409 3–617 0–507 8–568 7–529 6–728 5–344 7–256 1–115 1–309 2–818 8–459 5–155 8–185 9–159 9–547 7–346 8–52