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Fractions and Number Sentences

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Fractions and Number Sentences

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Part 1: Equivalent Fractions

Complete each equivalent fraction. Remember to multiply or divide the numerator and denominator by the same number.

1. 1/2 = ____/8
2. 3/5 = 12/____
3. 4/10 = 2/____
4. Which pair shows equivalent fractions?

2/3 and 4/6

3/4 and 6/10

1/2 and 3/8

5. 7/8 = ____/16
6. 2/3 = ____/12
7. 9/____ = 3/4
8. Are 6/9 and 2/3 equivalent? Explain how you know.

Part 2: Compare and Order Fractions

Write <, > or = in each gap. For ordering questions, write the fractions from least to greatest. Show your working where needed.

9. 3/4 ____ 5/8
10. 2/3 ____ 6/10
11. 4/5 ____ 8/10
12. 3/6 ____ 2/3
13. Order these fractions from least to greatest: 1/2, 3/4, 2/3
14. Order these fractions from least to greatest: 5/10, 2/5, 3/4
15. Order these fractions from least to greatest: 7/8, 4/6, 3/5
16. Order these fractions from least to greatest: 2/10, 1/3, 3/8

Part 3: Number Sentences and Challenges

Use a box or a letter for the unknown. Work backwards using inverse operations. Do not use a calculator.

17. I am thinking of a number. When I double it and add 9, the answer is 23. What is my number?

Number sentence: 2 × □ + 9 = 23

18. I triple a number and subtract 4. The answer is 20. What is the number?

Number sentence: 3 × □ − 4 = 20

19. Half of a number plus 6 equals 14. What is the number?

Number sentence: □ ÷ 2 + 6 = 14

20. Five times a number equals 45. What is the number?

Number sentence: 5 × □ = 45

21. A number plus 18 equals 31. What is the number?

Number sentence: □ + 18 = 31

22. Four times a number plus 7 equals 35. What is the number?

Number sentence: 4 × □ + 7 = 35

23. A number divided by 3 equals 6. What is the number?

Number sentence: □ ÷ 3 = 6

24. I double a number and subtract 5. The answer is 17. What is the number?

Number sentence: 2 × □ − 5 = 17

Challenge Problems

25. A jug is 3/4 full. Mia adds 1/8 of a jug more. What fraction of the jug is full now? Show an equivalent-fraction calculation.
26. I multiply a number by 4 and then subtract 6. The answer is 30. Write a number sentence and solve it.

Answer Key

1. 4   2. 20   3. 5   4. 2/3 and 4/6

5. 14   6. 8   7. 12   8. Yes; 6/9 simplifies to 2/3.

9. >   10. >   11. =   12. <

13. 1/2, 2/3, 3/4

14. 2/5, 5/10, 3/4

15. 3/5, 4/6, 7/8

16. 2/10, 1/3, 3/8

17. 7   18. 8   19. 16   20. 9

21. 13   22. 7   23. 18   24. 11

25. 3/4 + 1/8 = 6/8 + 1/8 = 7/8

26. 4 × □ − 6 = 30; □ = 9

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