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Class 7 Maths Worksheet: Fractions and Decimals

Maths worksheets lesson 50: Fractions and decimals: multiply and divide · Set 378 · 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. 1.1/7 × 12 =
  2. 2.8/9 × 11 =
  3. 3.5/7 × 7 =
  4. 4.One packet of rice weighs 2.2 kg. How many kg do 5 of them make in all? =
  5. 5.1/3 × 8 =
  6. 6.1/7 ÷ 1/5 =
  7. 7.One bag of potatoes weighs 7 kg. How many kg do 11 of them make in all? =
  8. 8.0.7 × 0.7 =
  9. 9.One roll of ribbon has 2.8 m. How many m do 11 of them make in all? =
  10. 10.One packet of rice weighs 1.2 kg. How many kg do 11 of them make in all? =
  11. 11.5/6 × 11 =
  12. 12.26.44 ÷ 4 =
  13. 13.2/7 ÷ 2/7 =
  14. 14.46.55 ÷ 5 =
  15. 15.One packet of rice weighs 6 kg. How many kg do 2 of them make in all? =
  16. 16.4/9 × 9 =
  17. 17.1/3 × 1/7 =
  18. 18.6.9 × 0.8 =
  19. 19.3/8 × 11 =
  20. 20.8.8 × 0.8 =
  21. 21.3/5 × 14 =
  22. 22.5/6 ÷ 2/5 =
  23. 23.1/4 × 1/8 =
  24. 24.1/2 × 7 =
  25. 25.8.9 × 0.3 =
  26. 26.5/9 × 3 =
  27. 27.5.9 × 0.6 =
  28. 28.2/7 × 14 =
  29. 29.1/5 × 15 =
  30. 30.One bag of potatoes weighs 8.9 kg. How many kg do 10 of them make in all? =
  31. 31.1/9 × 6 =
  32. 32.6/7 × 6/7 =
  33. 33.1/6 × 5 =
  34. 34.4/5 ÷ 4/5 =
  35. 35.7/9 ÷ 5/6 =
  36. 36.5/7 ÷ 1/4 =
  37. 37.3/5 × 1/5 =
  38. 38.One bottle of oil holds 1.3 L. How many L do 4 of them make in all? =
  39. 39.1/3 × 12 =
  40. 40.33.84 ÷ 8 =

Answer key

  1. 12/7
  2. 88/9
  3. 5
  4. 11
  5. 8/3
  6. 5/7
  7. 77
  8. 0.49
  9. 30.8
  10. 13.2
  11. 55/6
  12. 6.61
  13. 1
  14. 9.31
  15. 12
  16. 4
  17. 1/21
  18. 5.52
  19. 33/8
  20. 7.04
  21. 42/5
  22. 25/12
  23. 1/32
  24. 7/2
  25. 2.67
  26. 5/3
  27. 3.54
  28. 4
  29. 3
  30. 89
  31. 2/3
  32. 36/49
  33. 5/6
  34. 1
  35. 14/15
  36. 20/7
  37. 3/25
  38. 5.2
  39. 4
  40. 4.23

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