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Class 7 Maths Worksheet: Fractions and Decimals

Maths worksheets lesson 50: Fractions and decimals: multiply and divide · Set 109 · 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 jug of milk holds 7.9 L. How many L do 8 of them make in all? =
  2. 2.1/4 ÷ 7/9 =
  3. 3.One jug of milk holds 4.2 L. How many L do 12 of them make in all? =
  4. 4.7.2 ÷ 0.8 =
  5. 5.One roll of ribbon has 6.6 m. How many m do 11 of them make in all? =
  6. 6.One packet of rice weighs 9.4 kg. How many kg do 6 of them make in all? =
  7. 7.5/6 × 6 =
  8. 8.4.2 ÷ 0.7 =
  9. 9.One packet of rice weighs 2.5 kg. How many kg do 4 of them make in all? =
  10. 10.16.12 ÷ 4 =
  11. 11.51.12 ÷ 8 =
  12. 12.9.8 × 0.8 =
  13. 13.9.9 × 0.9 =
  14. 14.1.92 ÷ 4 =
  15. 15.One bag of potatoes weighs 1.8 kg. How many kg do 12 of them make in all? =
  16. 16.1/2 × 1/3 =
  17. 17.1/8 × 4/7 =
  18. 18.2/5 × 14 =
  19. 19.3.4 × 0.9 =
  20. 20.1.88 ÷ 2 =
  21. 21.4/9 × 1/2 =
  22. 22.7/8 × 3/4 =
  23. 23.1/8 × 4 =
  24. 24.9.9 ÷ 0.9 =
  25. 25.One bottle of oil holds 7 L. How many L do 3 of them make in all? =
  26. 26.1.8 × 0.9 =
  27. 27.9.6 ÷ 0.8 =
  28. 28.8.2 × 0.6 =
  29. 29.5/6 ÷ 3/4 =
  30. 30.3/4 × 4/7 =
  31. 31.16.18 ÷ 2 =
  32. 32.0.1 × 0.8 =
  33. 33.6/7 ÷ 1/9 =
  34. 34.2/7 ÷ 4/5 =
  35. 35.One jug of milk holds 1.4 L. How many L do 7 of them make in all? =
  36. 36.1/2 × 13 =
  37. 37.4/5 × 2/7 =
  38. 38.6/7 × 5 =
  39. 39.2/5 × 5/8 =
  40. 40.1/6 × 15 =

Answer key

  1. 63.2
  2. 9/28
  3. 50.4
  4. 9
  5. 72.6
  6. 56.4
  7. 5
  8. 6
  9. 10
  10. 4.03
  11. 6.39
  12. 7.84
  13. 8.91
  14. 0.48
  15. 21.6
  16. 1/6
  17. 1/14
  18. 28/5
  19. 3.06
  20. 0.94
  21. 2/9
  22. 21/32
  23. 1/2
  24. 11
  25. 21
  26. 1.62
  27. 12
  28. 4.92
  29. 10/9
  30. 3/7
  31. 8.09
  32. 0.08
  33. 54/7
  34. 5/14
  35. 9.8
  36. 13/2
  37. 8/35
  38. 30/7
  39. 1/4
  40. 5/2

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