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Class 7 Maths Worksheet: Fractions and Decimals

Maths worksheets lesson 50: Fractions and decimals: multiply and divide · Set 80 · 40 sums
TalentJR

The method (Flip and multiply): a/b × c/d = (a × c)/(b × d), then simplify. A whole number n is n/1. a/b ÷ c/d = a/b × d/c. Decimal × decimal: multiply as whole numbers; the answer has as many decimal places as both numbers together — 1.2 × 0.3 = 0.36. Decimal ÷ decimal: multiply both by 10 (or 100) first — 2.4 ÷ 0.6 = 24 ÷ 6 = 4.

NameDateTime takenScore ___ / 40
  1. 1.One packet of rice weighs 1.4 kg. How many kg do 4 of them make in all? =
  2. 2.3/5 × 7 =
  3. 3.1/5 × 10 =
  4. 4.1/2 × 6/7 =
  5. 5.8/9 × 5/6 =
  6. 6.2.6 ÷ 5 =
  7. 7.9.6 ÷ 0.8 =
  8. 8.2.4 × 0.6 =
  9. 9.One packet of rice weighs 3.8 kg. How many kg do 2 of them make in all? =
  10. 10.8.32 ÷ 4 =
  11. 11.1/4 × 3/8 =
  12. 12.5.8 × 0.3 =
  13. 13.19.12 ÷ 8 =
  14. 14.3/5 × 1/7 =
  15. 15.One packet of rice weighs 4.2 kg. How many kg do 8 of them make in all? =
  16. 16.3.2 ÷ 0.8 =
  17. 17.2/5 × 8 =
  18. 18.1/2 × 5/9 =
  19. 19.2/3 × 6/7 =
  20. 20.One roll of ribbon has 1.3 m. How many m do 5 of them make in all? =
  21. 21.One jug of milk holds 1.8 L. How many L do 10 of them make in all? =
  22. 22.One roll of ribbon has 9.6 m. How many m do 10 of them make in all? =
  23. 23.1/4 × 2 =
  24. 24.29.96 ÷ 4 =
  25. 25.5/9 × 5 =
  26. 26.8.4 ÷ 0.7 =
  27. 27.4.2 × 0.2 =
  28. 28.5/8 × 10 =
  29. 29.1/9 × 9 =
  30. 30.One packet of rice weighs 3.1 kg. How many kg do 9 of them make in all? =
  31. 31.8/9 × 7 =
  32. 32.1/2 × 1/9 =
  33. 33.2/3 × 2/9 =
  34. 34.1 ÷ 0.2 =
  35. 35.8/9 × 11 =
  36. 36.One roll of ribbon has 3.7 m. How many m do 9 of them make in all? =
  37. 37.2/5 × 10 =
  38. 38.One bag of potatoes weighs 3 kg. How many kg do 10 of them make in all? =
  39. 39.7/8 × 7/9 =
  40. 40.1/5 × 6 =

Answer key

  1. 5.6
  2. 21/5
  3. 2
  4. 3/7
  5. 20/27
  6. 0.52
  7. 12
  8. 1.44
  9. 7.6
  10. 2.08
  11. 3/32
  12. 1.74
  13. 2.39
  14. 3/35
  15. 33.6
  16. 4
  17. 16/5
  18. 5/18
  19. 4/7
  20. 6.5
  21. 18
  22. 96
  23. 1/2
  24. 7.49
  25. 25/9
  26. 12
  27. 0.84
  28. 25/4
  29. 1
  30. 27.9
  31. 56/9
  32. 1/18
  33. 4/27
  34. 5
  35. 88/9
  36. 33.3
  37. 4
  38. 30
  39. 49/72
  40. 6/5

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