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Class 7 Maths Worksheet: Fractions and Decimals

Maths worksheets lesson 50: Fractions and decimals: multiply and divide · Set 20 · 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. 1.1/8 × 14 =
  2. 2.4.3 × 0.3 =
  3. 3.One packet of rice weighs 5.1 kg. How many kg do 10 of them make in all? =
  4. 4.One bag of potatoes weighs 6.3 kg. How many kg do 7 of them make in all? =
  5. 5.5.48 ÷ 4 =
  6. 6.8.1 ÷ 0.9 =
  7. 7.One packet of rice weighs 3.8 kg. How many kg do 2 of them make in all? =
  8. 8.36.72 ÷ 4 =
  9. 9.3.5 ÷ 0.7 =
  10. 10.1/8 ÷ 1/9 =
  11. 11.9.5 × 0.3 =
  12. 12.8/9 × 6/7 =
  13. 13.One jug of milk holds 7.1 L. How many L do 3 of them make in all? =
  14. 14.2/7 ÷ 2/9 =
  15. 15.One roll of ribbon has 3.5 m. How many m do 2 of them make in all? =
  16. 16.2/3 ÷ 3/7 =
  17. 17.6.4 ÷ 0.8 =
  18. 18.2/5 × 4 =
  19. 19.6.8 × 0.3 =
  20. 20.2/5 × 1/8 =
  21. 21.3/5 × 11 =
  22. 22.2/9 × 1/2 =
  23. 23.3/8 ÷ 3/4 =
  24. 24.8/9 × 1/2 =
  25. 25.5/8 × 3/5 =
  26. 26.5/8 × 4 =
  27. 27.One bottle of oil holds 3.7 L. How many L do 2 of them make in all? =
  28. 28.One bottle of oil holds 8.9 L. How many L do 6 of them make in all? =
  29. 29.8/9 ÷ 1/9 =
  30. 30.3.5 × 0.8 =
  31. 31.3.2 × 0.4 =
  32. 32.One bag of potatoes weighs 8.6 kg. How many kg do 10 of them make in all? =
  33. 33.6/7 × 5/9 =
  34. 34.1/7 × 3 =
  35. 35.3.7 × 0.8 =
  36. 36.18.56 ÷ 8 =
  37. 37.One bottle of oil holds 8.5 L. How many L do 8 of them make in all? =
  38. 38.5.5 ÷ 0.5 =
  39. 39.7/9 × 11 =
  40. 40.1/9 × 1/5 =

Answer key

  1. 7/4
  2. 1.29
  3. 51
  4. 44.1
  5. 1.37
  6. 9
  7. 7.6
  8. 9.18
  9. 5
  10. 9/8
  11. 2.85
  12. 16/21
  13. 21.3
  14. 9/7
  15. 7
  16. 14/9
  17. 8
  18. 8/5
  19. 2.04
  20. 1/20
  21. 33/5
  22. 1/9
  23. 1/2
  24. 4/9
  25. 3/8
  26. 5/2
  27. 7.4
  28. 53.4
  29. 8
  30. 2.8
  31. 1.28
  32. 86
  33. 10/21
  34. 3/7
  35. 2.96
  36. 2.32
  37. 68
  38. 11
  39. 77/9
  40. 1/45

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