17 AUGUST Consulting Author Dr Dicky Susanto MATHS MINDS-ON Workbook Workbook 2nd Edition Singapore Maths Method Maths Exploration Active-learning Approach 21st Century Learning Skills ©Praxis Publishing Singapore Pte. Ltd.
IV Chapter 1 Numbers 0 to 10..........................1 Exercises.....................................5 Chapter 2 Addition Within 10......................21 Exercises...................................23 Chapter 3 Subtraction Within 10 ...............31 Exercises...................................33 Chapter 4 Shapes Around Us.....................42 Exercises...................................43 Chapter 5 Numbers 11 to 20 ......................48 Exercises ..................................52 Chapter 6 Addition and Subtraction Within 20 ...................................60 Exercises...................................62 Chapter 7 Length........................................75 Exercises...................................76 Chapter 8 Picture Graphs...........................85 Exercises...................................87 Chapter 9 Tessellations..............................94 Exercises...................................94 Chapter 10 Temperature ............................101 Exercises.................................101 Contents SCAN ME For General Revision ©Praxis Publishing Singapore Pte. Ltd.
1 Minds-on Maths Workbook Grade 1 Numbers 0 to 10 There is no animal here. Object Ten-Frame Numbers 0 Zero 1 One 2 Two 3 Three 4 Four 5 Five 6 Six 7 Seven 8 Eight 9 Nine 10 Ten Numbers 0 to 10 Chapter 1 ©Praxis Publishing Singapore Pte. Ltd.
5 Minds-on Maths Workbook Grade 1 A Join the dots to form the number and name it. B Count. Write the number of objects in words and in numerals. One Exercises ©Praxis Publishing Singapore Pte. Ltd.
13 Minds-on Maths Workbook Grade 1 L Underline the correct answers in brackets. M Write the smaller number on the higher end and the greater number on the lower end of the see-saw. 1. 4 is (smaller than, greater than, equal to) 5. 2. 7 is (smaller than, greater than, equal to) 9. 3. 0 is (smaller than, greater than, equal to) 2. 4. 8 is (smaller than, greater than, equal to) 4. 5. 5 is (smaller than, greater than, equal to) 5. 6. 7 is (smaller than, greater than, equal to) 2. 1. 3. 2. 4. 7 6 3 0 2 4 1 5 2 ©Praxis Publishing Singapore Pte. Ltd.
19 Minds-on Maths Workbook Grade 1 U Find all the number bonds for these numbers. 1. (a) 4 (b) 4 (c) 4 2. (a) 5 (b) 5 (c) 5 3. (a) 7 (b) 7 (c) 7 (d) 7 4. (a) 6 (b) 6 (c) 6 (d) 6 5. (a) 9 (b) 9 (c) 9 (d) 9 (e) 9 ©Praxis Publishing Singapore Pte. Ltd.
21 Minds-on Maths Workbook Grade 1 Meaning of addition + = There are 3 birds altogether. Ways to add There are 2 birds. Another bird comes to join them. How many birds are there altogether? How many eggs are there altogether? + = Two plus one equals three . 2 1 3 Addition equation Addition Within 10 Chapter 2 ©Praxis Publishing Singapore Pte. Ltd.
27 Minds-on Maths Workbook Grade 1 G Fill in the missing numbers. 1. 3 + = 6 3. + 2 = 7 5. + 3 = 9 2. 5 + = 9 4. 7 + = 8 6. + 2 = 4 7. 4 + = 7 9. 2 + = 9 11. + 5 = 10 8. 3 + = 8 10. + 4 = 6 12. 8 + = 10 1. There are apples on the tray. Billy puts pears on the same tray. There are fruits altogether on the tray now. + = H Make addition stories. ©Praxis Publishing Singapore Pte. Ltd.
31 Minds-on Maths Workbook Grade 1 Meaning of subtraction There are 4 seahorses. Then 1 seahorse swims away. How many seahorses are left? Ways to subtract There are 5 prawns. 2 prawns are caught. How many prawns are left? 4 – 1 = 3 Four minus one equals three . 3 seahorses are left. Subtraction equation Subtraction Within 10 Chapter 3 ©Praxis Publishing Singapore Pte. Ltd.
33 Minds-on Maths Workbook Grade 1 A Subtract by crossing out. 6 8 7 5 1 6 4 2 1. 2. 3. 4. – – – – = = = = Exercises ©Praxis Publishing Singapore Pte. Ltd.
39 Minds-on Maths Workbook Grade 1 H Match. 4 – 1 6 – 5 5 – 0 7 – 1 9 – 5 8 – 6 5 – 3 6 – 2 9 – 3 8 – 3 7 – 6 6 – 3 1 2 3 4 5 6 I Solve the following word problems. 1. There are 5 strawberries. 2 strawberries are taken. How many strawberries are left? – = strawberries are left. 2. Amelia has 8 flowers. She gives 5 of them to her sister. How many flowers does Amelia have now? – = Amelia has flowers now. ©Praxis Publishing Singapore Pte. Ltd.
42 Chapter 4 Shapes Around Us Shapes A triangle has 3 sides and 3 corners. A rectangle has 4 sides and 4 corners. A circle is round. It has no corners. A square has 4 sides and 4 corners. Shapes Around Us Chapter 4 ©Praxis Publishing Singapore Pte. Ltd.
47 Minds-on Maths Workbook Grade 1 F Identify the shapes of the objects. G Match each object with its shape. 1. 5. 2. 6. 3. 7. 4. 8. ©Praxis Publishing Singapore Pte. Ltd.
48 Chapter 5 Numbers 11 to 20 Numbers 11 to 20 11 Eleven 13 Thirteen 15 Fifteen 17 Seventeen 19 Nineteen 12 Twelve 14 Fourteen 16 Sixteen 18 Eighteen 20 Twenty Numbers 11 to 20 Chapter 5 ©Praxis Publishing Singapore Pte. Ltd.
51 Minds-on Maths Workbook Grade 1 Count forward: count from smaller numbers to greater numbers 11 ➞ 12 ➞ 13 ➞ 14 ➞ 15 ➞ 16 ➞ 17 ➞ 18 ➞ 19 ➞ 20 Count backward: count from greater numbers to smaller numbers 20 ➞ 19 ➞ 18 ➞ 17 ➞ 16 ➞ 15 ➞ 14 ➞ 13 ➞ 12 ➞ 11 Ordering numbers 13 books 11 books 16 books 16 is greater than 13. 11 is smaller than 13. 16 is greater than 11. 11 is smaller than 16. 16 is the greatest. 11 is the smallest. There are two ways to arrange numbers in order. (a) Start with the greatest number to the smallest number. (b) Start with the smallest number to the greatest number. 16, 13, 11 greatest smallest 11, 13, 16 smallest greatest Counting forward and backward (descending order) (ascending order) ©Praxis Publishing Singapore Pte. Ltd.
54 Chapter 5 Numbers 11 to 20 C Fill in the blanks. D Estimate the number of each type of items. Then, count and write the correct number. 1. 10 and 1 make . 2. 10 and 3 make . 3. 10 and 5 make . 4. 10 and 9 make . 1. Estimation: Calculation: 2. Estimation: Calculation: 3. Estimation: Calculation: 4. Estimation: Calculation: ©Praxis Publishing Singapore Pte. Ltd.
60 Chapter 6 Addition and Subtraction Within 20 Ways to add Add by counting on 6 + 8 = 14 10 2 3 4 5 6 7 8 9 10 11 12 13 15 16 17 18 19 20 +8 14 Add by making 10 There are 8 butterflies. 4 more butterflies join them. How many butterflies are there altogether? 8 + 4 = 12 8 + 4 = 10 + 2 = 12 10 2 + Add by regrouping into tens and ones 12 + 3 = 15 + 10 5 12 + 3 = 10 + 5 = 15 2 2 10 2 Addition and Subtraction Within 20 Chapter 6 ©Praxis Publishing Singapore Pte. Ltd.
63 Minds-on Maths Workbook Grade 1 B Use the number lines below to add. 10 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1. 7 + 4 = 10 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 2. 5 + 9 = 10 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 3. 10 + 5 = 10 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 4. 6 + 8 = 10 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 5. 13 + 7 = ©Praxis Publishing Singapore Pte. Ltd.
67 Minds-on Maths Workbook Grade 1 1. – = 2. – = 3. – = 4. – = 5. – = 6. – = F Count and write the subtraction sentences. ©Praxis Publishing Singapore Pte. Ltd.
75 Minds-on Maths Workbook Grade 1 Words related to length A B C Building A is tall. It is taller than Building B. Building C is short. It is shorter than Building B. Building A is the tallest. Building C is the shortest. Pencil A is long. It is longer than Pencil B. Pencil C is short. It is shorter than Pencil B. Pencil A is the longest. Pencil C is the shortest. A B C Comparing and measuring lengths Tall Short Long Short Length is how long something is from one end to another. Length Chapter 7 ©Praxis Publishing Singapore Pte. Ltd.
76 Chapter 7 Length A Circle each object accordingly. The shorter rope. The taller tree. The longer ruler. The shorter building. The longer necklace. The taller animal. 1. 3. 5. 2. 6. 4. Exercises ©Praxis Publishing Singapore Pte. Ltd.
77 Minds-on Maths Workbook Grade 1 B Underline the correct answer. Tree A is (taller, shorter) than Tree B. Tree B is (taller, shorter) than Tree A. Arya is (taller, shorter) than Chelsea. Chelsea is (taller, shorter) than Arya. The pencil is (longer, shorter) than the brush. The brush is (longer, shorter) than the pencil. The snake is (longer, shorter) than the earthworm. The earthworm is (longer, shorter) than the snake. Tree A Arya Tree B Chelsea Pencil Brush Snake Earthworm 1. 2. 3. 4. ©Praxis Publishing Singapore Pte. Ltd.
78 Chapter 7 Length C Compare the lengths of each group of objects. 3. Colour the tallest building blue and the shortest building green. Pupil A is the . Pupil B is the . Pupil C is than Pupil B but than Pupil A. 1. 2. A B C The ruler is the . The nail is the . The pencil is than the nail but than the ruler. ©Praxis Publishing Singapore Pte. Ltd.
83 Minds-on Maths Workbook Grade 1 G Measure and state the length of each object. H Circle the correct answer. 1. A football field is about 100 (metres, centimetres) long. 2. A refrigerator is approximately 2 (metres, centimetres) high. 3. The breadth of a door is around 1 (metre, centimetre). 4. A tree can be as tall as 30 (metres, centimetres). 5. A book’s thickness is about 2 (metres, centimetres). 6. A swimming pool’s depth can be up to 2 (metres, centimetres). 7. The distance between two lamp posts on a street is about 20 (metres, centimetres). 1. 2. cm cm 3. 4. cm cm 5. 6. cm cm U-READY + (–) ©Praxis Publishing Singapore Pte. Ltd.
85 Minds-on Maths Workbook Grade 1 We can present the data we have collected in a list. List of Fruits in the Baskets 5 6 3 4 Data also can be presented in table. In a table, data is organised in rows and columns. Fruits in the Baskets Type of fruits Number of fruits 5 6 3 4 Sorting and organising data The quantity of oranges, watermelons, apples and dragonfruits are examples of data. Picture Graphs Chapter 8 The title describes about the data in the table. The headings tell us what data is in each column or row. ©Praxis Publishing Singapore Pte. Ltd.
88 Chapter 8 Picture Graphs C The picture graph below shows the number of different types of gadgets owned by a group of pupils in a class. Fill in the blanks with the correct answers. Types of Gadgets Owned by Pupils in a Class Laptop Tablet Smartwatch Smartphone Each represents 1 pupil. 1. pupils own laptops. 2. pupils own tablets. 3. There are pupils who own smartwatches. 4. There are pupils who own smartphones. 5. The gadget owned by most pupils is the . 6. The gadget owned by the least pupils is the . 7. There are fewer pupils who own smartwatches than tablets. 8. There are more pupils who own smartphones than laptops. ©Praxis Publishing Singapore Pte. Ltd.
91 Minds-on Maths Workbook Grade 1 F The picture graph below shows the number of snacks sold by a vending machine in a day. Fill in the blanks with the correct answers. 1. is the most popular snack. 2. is the least popular snack. 3. The same number of and were sold on that day. 4. units of cookies were sold. 5. more units of potato chips were sold than trail mix on that day. 6. fewer units of cookies were sold than chocolate bars on that day. A represents 1 unit of snack. Potato chips Chocolate bar Trail mix Granola bar Cookies Number of Snacks Sold by a Vending Machine ©Praxis Publishing Singapore Pte. Ltd.
94 Chapter 9 Tessellations A Identify and shade the unit shape used in each of the following tessellations. 1. 2. 3. 4. 5. 6. Tessellations Chapter 9 ©Praxis Publishing Singapore Pte. Ltd.
101 Minds-on Maths Workbook Grade 1 Comparing and ordering temperatures Our bodies can help us tell if it is hot or cold. We cannot see heat, but we can feel it. Temperature is how much heat is in something. Another way to think of temperature is how hot or cold something is. A Tick () the picture that shows “cold”. Cross () the picture that shows “hot”. 1. Temperature Chapter 10 Exercises ©Praxis Publishing Singapore Pte. Ltd.
103 Minds-on Maths Workbook Grade 1 C Fill in the blanks with the correct answers. Coffee Rice Popsicle D Arrange the pictures in order. Write 1, 2 and 3 in the boxes. 1. The ____________ is the hottest. 2. The ____________ is the coldest. 1. Begin with the coldest object. 2. Begin with the hottest object. ©Praxis Publishing Singapore Pte. Ltd.