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# Understanding Division Workbook preview

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### Understanding Division Workbook preview

2. 2. Division Complete. 1. Divide 12 cookies into groups of 3. ____ groups 12 ÷ 3 = ____ 2. Divide 12 bells into groups of 2. ____ groups 12 ÷ 2 = ____ 3. Divide 12 leaves into groups of 4. ____ groups 12 ÷ 4 = ____ 4. Divide 10 birds into groups of 5. ____ groups 10 ÷ 5 = ____ 5. Divide 12 strawberries into groups of 2. ____ groups 12 ÷ 2 = ____ Name: ______________________________ Date: __________________
3. 3. 1. Divide 12 cookies into groups of 3. 4 groups 12 ÷ 3 = 4 2. Divide 12 bells into groups of 2. 6 groups 12 ÷ 2 = 6 3. Divide 12 leaves into groups of 4. 3 groups 12 ÷ 4 = 3 4. Divide 10 birds into groups of 5. 2 groups 10 ÷ 5 = 2 5. Divide 12 strawberries into groups of 2. 6 groups 12 ÷ 2 = 6
4. 4. Division Write a division fact for each picture. 1. 2. 3. 4. 5. 6. 7. Name: ______________________________ Date: __________________
5. 5. 1. 10 ÷ 5 = 2 2. 12 ÷ 2 = 6 3. 12 ÷ 4 = 3 4. 12 ÷ 3 = 4 5. 10 ÷ 5 = 2 6. 12 ÷ 3 = 4 7. 12 ÷ 4 = 3
6. 6. Division Write a division fact for each picture. 1. 2. 3. 4. 5. 6. 7. Name: ______________________________ Date: __________________
7. 7. 1. 42 ÷ 7 = 6 2. 36 ÷ 2 = 18 3. 27 ÷ 9 = 3 4. 30 ÷ 3 = 10 5. 30 ÷ 5 = 6 6. 24 ÷ 8 = 3 7. 44 ÷ 4 = 11
8. 8. Division Complete. 1. Divide 44 raindrops into groups of 4. ____ groups 44 ÷ 4 = ____ 2. Divide 24 baseballs into groups of 8. ____ groups 24 ÷ 8 = ____ 3. Divide 30 ants into groups of 3. ____ groups 30 ÷ 3 = ____ 4. Divide 36 dots into groups of 2. ____ groups 36 ÷ 2 = ____ 5. Divide 30 snowflakes into groups of 6. ____ groups 30 ÷ 6 = ____ 6. Divide 30 ants into groups of 5. ____ groups 30 ÷ 5 = ____ 7. Divide 27 baseballs into groups of 9. ____ groups 27 ÷ 9 = ____ Name: ______________________________ Date: __________________
9. 9. 1. Divide 44 raindrops into groups of 4. 11 groups 44 ÷ 4 = 11 2. Divide 24 baseballs into groups of 8. 3 groups 24 ÷ 8 = 3 3. Divide 30 ants into groups of 3. 10 groups 30 ÷ 3 = 10 4. Divide 36 dots into groups of 2. 18 groups 36 ÷ 2 = 18 5. Divide 30 snowflakes into groups of 6. 5 groups 30 ÷ 6 = 5 6. Divide 30 ants into groups of 5. 6 groups 30 ÷ 5 = 6 7. Divide 27 baseballs into groups of 9. 3 groups 27 ÷ 9 = 3
10. 10. Addition and Division with 2 Fill in the missing numbers. 1. 2 + 2 = ______ ______ groups of the number ______ ______ ÷ 2 = 2 2. 2 + 2 + 2 + 2 + 2 + 2 + 2 = ______ ______ groups of the number ______ ______ ÷ 2 = 7 3. 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = ______ ______ groups of the number ______ ______ ÷ 2 = 9 4. 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = ______ ______ groups of the number ______ 20 ÷ 2 = ______ 5. 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = ______ ______ groups of the number ______ ______ ÷ 2 = 8 6. 2 + 2 + 2 + 2 + 2 + 2 = ______ ______ groups of the number ______ 12 ÷ ______ = 6 7. 2 + 2 + 2 = ______ ______ groups of the number ______ 6 ÷ ______ = 3 8. 2 + 2 + 2 + 2 = ______ ______ groups of the number ______ 8 ÷ 2 = ______ 9. 2 + 2 + 2 + 2 + 2 = ______ ______ groups of the number ______ ______ ÷ 2 = 5 Name: ______________________________ Date: __________________
11. 11. 1. 2 + 2 = 4 2 groups of the number 2 4 ÷ 2 = 2 2. 2 + 2 + 2 + 2 + 2 + 2 + 2 = 14 7 groups of the number 2 14 ÷ 2 = 7 3. 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = 18 9 groups of the number 2 18 ÷ 2 = 9 4. 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = 20 10 groups of the number 2 20 ÷ 2 = 10 5. 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = 16 8 groups of the number 2 16 ÷ 2 = 8 6. 2 + 2 + 2 + 2 + 2 + 2 = 12 6 groups of the number 2 12 ÷ 2 = 6 7. 2 + 2 + 2 = 6 3 groups of the number 2 6 ÷ 2 = 3 8. 2 + 2 + 2 + 2 = 8 4 groups of the number 2 8 ÷ 2 = 4 9. 2 + 2 + 2 + 2 + 2 = 10 5 groups of the number 2 10 ÷ 2 = 5
12. 12. Addition and Division with 3 Fill in the missing numbers. 1. 3 + 3 = ______ ______ groups of the number ______ ______ ÷ 3 = 2 2. 3 + 3 + 3 + 3 = ______ ______ groups of the number ______ ______ ÷ 3 = 4 3. 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 = ______ ______ groups of the number ______ ______ ÷ 3 = 9 4. 3 + 3 + 3 + 3 + 3 = ______ ______ groups of the number ______ ______ ÷ 3 = 5 5. 3 + 3 + 3 = ______ ______ groups of the number ______ 9 ÷ 3 = ______ 6. 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 = ______ ______ groups of the number ______ 24 ÷ ______ = 8 7. 3 + 3 + 3 + 3 + 3 + 3 = ______ ______ groups of the number ______ 18 ÷ 3 = ______ 8. 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 = ______ ______ groups of the number ______ 30 ÷ ______ = 10 9. 3 + 3 + 3 + 3 + 3 + 3 + 3 = ______ ______ groups of the number ______ ______ ÷ 3 = 7 Name: ______________________________ Date: __________________
13. 13. 1. 3 + 3 = 6 2 groups of the number 3 6 ÷ 3 = 2 2. 3 + 3 + 3 + 3 = 12 4 groups of the number 3 12 ÷ 3 = 4 3. 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 = 27 9 groups of the number 3 27 ÷ 3 = 9 4. 3 + 3 + 3 + 3 + 3 = 15 5 groups of the number 3 15 ÷ 3 = 5 5. 3 + 3 + 3 = 9 3 groups of the number 3 9 ÷ 3 = 3 6. 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 = 24 8 groups of the number 3 24 ÷ 3 = 8 7. 3 + 3 + 3 + 3 + 3 + 3 = 18 6 groups of the number 3 18 ÷ 3 = 6 8. 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 = 30 10 groups of the number 3 30 ÷ 3 = 10 9. 3 + 3 + 3 + 3 + 3 + 3 + 3 = 21 7 groups of the number 3 21 ÷ 3 = 7
14. 14. Addition and Division with 4 Fill in the missing numbers. 1. 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 = ______ ______ groups of the number ______ ______ ÷ 4 = 8 2. 4 + 4 + 4 + 4 + 4 + 4 = ______ ______ groups of the number ______ ______ ÷ 4 = 6 3. 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 = ______ ______ groups of the number ______ ______ ÷ 4 = 10 4. 4 + 4 + 4 + 4 + 4 + 4 + 4 = ______ ______ groups of the number ______ 28 ÷ ______ = 7 5. 4 + 4 + 4 + 4 = ______ ______ groups of the number ______ 16 ÷ 4 = ______ 6. 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 = ______ ______ groups of the number ______ ______ ÷ 4 = 9 7. 4 + 4 + 4 + 4 + 4 = ______ ______ groups of the number ______ 20 ÷ ______ = 5 8. 4 + 4 = ______ ______ groups of the number ______ ______ ÷ 4 = 2 9. 4 + 4 + 4 = ______ ______ groups of the number ______ 12 ÷ 4 = ______ Name: ______________________________ Date: __________________
15. 15. 1. 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 = 32 8 groups of the number 4 32 ÷ 4 = 8 2. 4 + 4 + 4 + 4 + 4 + 4 = 24 6 groups of the number 4 24 ÷ 4 = 6 3. 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 = 40 10 groups of the number 4 40 ÷ 4 = 10 4. 4 + 4 + 4 + 4 + 4 + 4 + 4 = 28 7 groups of the number 4 28 ÷ 4 = 7 5. 4 + 4 + 4 + 4 = 16 4 groups of the number 4 16 ÷ 4 = 4 6. 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 = 36 9 groups of the number 4 36 ÷ 4 = 9 7. 4 + 4 + 4 + 4 + 4 = 20 5 groups of the number 4 20 ÷ 4 = 5 8. 4 + 4 = 8 2 groups of the number 4 8 ÷ 4 = 2 9. 4 + 4 + 4 = 12 3 groups of the number 4 12 ÷ 4 = 3
16. 16. Addition and Division with 5 Fill in the missing numbers. 1. 5 + 5 + 5 + 5 + 5 = ______ ______ groups of the number ______ ______ ÷ 5 = 5 2. 5 + 5 + 5 + 5 = ______ ______ groups of the number ______ ______ ÷ 5 = 4 3. 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = ______ ______ groups of the number ______ ______ ÷ 5 = 9 4. 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = ______ ______ groups of the number ______ 50 ÷ 5 = ______ 5. 5 + 5 + 5 = ______ ______ groups of the number ______ 15 ÷ ______ = 3 6. 5 + 5 = ______ ______ groups of the number ______ ______ ÷ 5 = 2 7. 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = ______ ______ groups of the number ______ 40 ÷ ______ = 8 8. 5 + 5 + 5 + 5 + 5 + 5 + 5 = ______ ______ groups of the number ______ 35 ÷ 5 = ______ 9. 5 + 5 + 5 + 5 + 5 + 5 = ______ ______ groups of the number ______ ______ ÷ 5 = 6 Name: ______________________________ Date: __________________
17. 17. 1. 5 + 5 + 5 + 5 + 5 = 25 5 groups of the number 5 25 ÷ 5 = 5 2. 5 + 5 + 5 + 5 = 20 4 groups of the number 5 20 ÷ 5 = 4 3. 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 45 9 groups of the number 5 45 ÷ 5 = 9 4. 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 50 10 groups of the number 5 50 ÷ 5 = 10 5. 5 + 5 + 5 = 15 3 groups of the number 5 15 ÷ 5 = 3 6. 5 + 5 = 10 2 groups of the number 5 10 ÷ 5 = 2 7. 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 40 8 groups of the number 5 40 ÷ 5 = 8 8. 5 + 5 + 5 + 5 + 5 + 5 + 5 = 35 7 groups of the number 5 35 ÷ 5 = 7 9. 5 + 5 + 5 + 5 + 5 + 5 = 30 6 groups of the number 5 30 ÷ 5 = 6
18. 18. Addition and Division with 6 Fill in the missing numbers. 1. 6 + 6 + 6 = ______ ______ groups of the number ______ ______ ÷ 6 = 3 2. 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = ______ ______ groups of the number ______ ______ ÷ 6 = 8 3. 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = ______ ______ groups of the number ______ ______ ÷ 6 = 9 4. 6 + 6 + 6 + 6 = ______ ______ groups of the number ______ 24 ÷ ______ = 4 5. 6 + 6 + 6 + 6 + 6 + 6 + 6 = ______ ______ groups of the number ______ 42 ÷ 6 = ______ 6. 6 + 6 = ______ ______ groups of the number ______ ______ ÷ 6 = 2 7. 6 + 6 + 6 + 6 + 6 = ______ ______ groups of the number ______ 30 ÷ ______ = 5 8. 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = ______ ______ groups of the number ______ ______ ÷ 6 = 10 9. 6 + 6 + 6 + 6 + 6 + 6 = ______ ______ groups of the number ______ 36 ÷ 6 = ______ Name: ______________________________ Date: __________________
19. 19. 1. 6 + 6 + 6 = 18 3 groups of the number 6 18 ÷ 6 = 3 2. 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = 48 8 groups of the number 6 48 ÷ 6 = 8 3. 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = 54 9 groups of the number 6 54 ÷ 6 = 9 4. 6 + 6 + 6 + 6 = 24 4 groups of the number 6 24 ÷ 6 = 4 5. 6 + 6 + 6 + 6 + 6 + 6 + 6 = 42 7 groups of the number 6 42 ÷ 6 = 7 6. 6 + 6 = 12 2 groups of the number 6 12 ÷ 6 = 2 7. 6 + 6 + 6 + 6 + 6 = 30 5 groups of the number 6 30 ÷ 6 = 5 8. 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = 60 10 groups of the number 6 60 ÷ 6 = 10 9. 6 + 6 + 6 + 6 + 6 + 6 = 36 6 groups of the number 6 36 ÷ 6 = 6
20. 20. Addition and Division with 7 Fill in the missing numbers. 1. 7 + 7 = ______ ______ groups of the number ______ ______ ÷ 7 = 2 2. 7 + 7 + 7 + 7 + 7 + 7 + 7 = ______ ______ groups of the number ______ ______ ÷ 7 = 7 3. 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 = ______ ______ groups of the number ______ ______ ÷ 7 = 9 4. 7 + 7 + 7 = ______ ______ groups of the number ______ 21 ÷ 7 = ______ 5. 7 + 7 + 7 + 7 + 7 = ______ ______ groups of the number ______ 35 ÷ ______ = 5 6. 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 = ______ ______ groups of the number ______ ______ ÷ 7 = 8 7. 7 + 7 + 7 + 7 = ______ ______ groups of the number ______ 28 ÷ 7 = ______ 8. 7 + 7 + 7 + 7 + 7 + 7 = ______ ______ groups of the number ______ ______ ÷ 7 = 6 9. 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 = ______ ______ groups of the number ______ 70 ÷ ______ = 10 Name: ______________________________ Date: __________________
21. 21. 1. 7 + 7 = 14 2 groups of the number 7 14 ÷ 7 = 2 2. 7 + 7 + 7 + 7 + 7 + 7 + 7 = 49 7 groups of the number 7 49 ÷ 7 = 7 3. 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 = 63 9 groups of the number 7 63 ÷ 7 = 9 4. 7 + 7 + 7 = 21 3 groups of the number 7 21 ÷ 7 = 3 5. 7 + 7 + 7 + 7 + 7 = 35 5 groups of the number 7 35 ÷ 7 = 5 6. 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 = 56 8 groups of the number 7 56 ÷ 7 = 8 7. 7 + 7 + 7 + 7 = 28 4 groups of the number 7 28 ÷ 7 = 4 8. 7 + 7 + 7 + 7 + 7 + 7 = 42 6 groups of the number 7 42 ÷ 7 = 6 9. 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 = 70 10 groups of the number 7 70 ÷ 7 = 10
22. 22. Addition and Division with 8 Fill in the missing numbers. 1. 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = ______ ______ groups of the number ______ ______ ÷ 8 = 9 2. 8 + 8 + 8 + 8 + 8 + 8 = ______ ______ groups of the number ______ ______ ÷ 8 = 6 3. 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = ______ ______ groups of the number ______ ______ ÷ 8 = 8 4. 8 + 8 + 8 + 8 + 8 = ______ ______ groups of the number ______ 40 ÷ ______ = 5 5. 8 + 8 + 8 + 8 + 8 + 8 + 8 = ______ ______ groups of the number ______ 56 ÷ 8 = ______ 6. 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = ______ ______ groups of the number ______ ______ ÷ 8 = 10 7. 8 + 8 + 8 = ______ ______ groups of the number ______ ______ ÷ 8 = 3 8. 8 + 8 = ______ ______ groups of the number ______ 16 ÷ 8 = ______ 9. 8 + 8 + 8 + 8 = ______ ______ groups of the number ______ 32 ÷ ______ = 4 Name: ______________________________ Date: __________________
23. 23. 1. 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 72 9 groups of the number 8 72 ÷ 8 = 9 2. 8 + 8 + 8 + 8 + 8 + 8 = 48 6 groups of the number 8 48 ÷ 8 = 6 3. 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 64 8 groups of the number 8 64 ÷ 8 = 8 4. 8 + 8 + 8 + 8 + 8 = 40 5 groups of the number 8 40 ÷ 8 = 5 5. 8 + 8 + 8 + 8 + 8 + 8 + 8 = 56 7 groups of the number 8 56 ÷ 8 = 7 6. 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 80 10 groups of the number 8 80 ÷ 8 = 10 7. 8 + 8 + 8 = 24 3 groups of the number 8 24 ÷ 8 = 3 8. 8 + 8 = 16 2 groups of the number 8 16 ÷ 8 = 2 9. 8 + 8 + 8 + 8 = 32 4 groups of the number 8 32 ÷ 8 = 4
24. 24. Addition and Division with 9 Fill in the missing numbers. 1. 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = ______ ______ groups of the number ______ ______ ÷ 9 = 9 2. 9 + 9 + 9 + 9 + 9 + 9 + 9 = ______ ______ groups of the number ______ ______ ÷ 9 = 7 3. 9 + 9 + 9 = ______ ______ groups of the number ______ ______ ÷ 9 = 3 4. 9 + 9 + 9 + 9 = ______ ______ groups of the number ______ ______ ÷ 9 = 4 5. 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = ______ ______ groups of the number ______ 72 ÷ ______ = 8 6. 9 + 9 + 9 + 9 + 9 = ______ ______ groups of the number ______ 45 ÷ 9 = ______ 7. 9 + 9 = ______ ______ groups of the number ______ ______ ÷ 9 = 2 8. 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = ______ ______ groups of the number ______ 90 ÷ ______ = 10 9. 9 + 9 + 9 + 9 + 9 + 9 = ______ ______ groups of the number ______ 54 ÷ 9 = ______ Name: ______________________________ Date: __________________
25. 25. 1. 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = 81 9 groups of the number 9 81 ÷ 9 = 9 2. 9 + 9 + 9 + 9 + 9 + 9 + 9 = 63 7 groups of the number 9 63 ÷ 9 = 7 3. 9 + 9 + 9 = 27 3 groups of the number 9 27 ÷ 9 = 3 4. 9 + 9 + 9 + 9 = 36 4 groups of the number 9 36 ÷ 9 = 4 5. 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = 72 8 groups of the number 9 72 ÷ 9 = 8 6. 9 + 9 + 9 + 9 + 9 = 45 5 groups of the number 9 45 ÷ 9 = 5 7. 9 + 9 = 18 2 groups of the number 9 18 ÷ 9 = 2 8. 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = 90 10 groups of the number 9 90 ÷ 9 = 10 9. 9 + 9 + 9 + 9 + 9 + 9 = 54 6 groups of the number 9 54 ÷ 9 = 6
26. 26. Addition and Division with 10 Fill in the missing numbers. 1. 10 + 10 + 10 + 10 + 10 + 10 = ______ ______ groups of the number ______ ______ ÷ 10 = 6 2. 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = ______ ______ groups of the number ______ ______ ÷ 10 = 8 3. 10 + 10 + 10 + 10 + 10 = ______ ______ groups of the number ______ ______ ÷ 10 = 5 4. 10 + 10 + 10 + 10 + 10 + 10 + 10 = ______ ______ groups of the number ______ ______ ÷ 10 = 7 5. 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = ______ ______ groups of the number ______ 90 ÷ ______ = 9 6. 10 + 10 + 10 + 10 = ______ ______ groups of the number ______ 40 ÷ 10 = ______ 7. 10 + 10 + 10 = ______ ______ groups of the number ______ ______ ÷ 10 = 3 8. 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = ______ ______ groups of the number ______ 100 ÷ ______ = 10 9. 10 + 10 = ______ ______ groups of the number ______ 20 ÷ 10 = ______ Name: ______________________________ Date: __________________
27. 27. 1. 10 + 10 + 10 + 10 + 10 + 10 = 60 6 groups of the number 10 60 ÷ 10 = 6 2. 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 80 8 groups of the number 10 80 ÷ 10 = 8 3. 10 + 10 + 10 + 10 + 10 = 50 5 groups of the number 10 50 ÷ 10 = 5 4. 10 + 10 + 10 + 10 + 10 + 10 + 10 = 70 7 groups of the number 10 70 ÷ 10 = 7 5. 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 90 9 groups of the number 10 90 ÷ 10 = 9 6. 10 + 10 + 10 + 10 = 40 4 groups of the number 10 40 ÷ 10 = 4 7. 10 + 10 + 10 = 30 3 groups of the number 10 30 ÷ 10 = 3 8. 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 100 10 groups of the number 10 100 ÷ 10 = 10 9. 10 + 10 = 20 2 groups of the number 10 20 ÷ 10 = 2