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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 407 · 40 questions
TalentJR

The fast method (Jump the point): Count the zeros: 10 → 1 jump, 100 → 2 jumps, 1000 → 3 jumps. × moves the point right; ÷ moves it left. Run out of digits? Fill the gaps with 0s. Drop 0s at the end of a decimal: 3.40 is 3.4.

NameDateTime takenScore ___ / 40
  1. 1.3.99 × 10 =
  2. 2.33.8 ÷ 100 =
  3. 3.47.48 ÷ 10 =
  4. 4.45.86 × 1000 =
  5. 5.346.1 × 1000 =
  6. 6.336.5 × 100 =
  7. 7.45.37 ÷ 10 =
  8. 8.28.69 × 1000 =
  9. 9.73.2 × 1000 =
  10. 10.332.9 ÷ 10 =
  11. 11.118.2 ÷ 100 =
  12. 12.83.2 ÷ 10 =
  13. 13.31.72 ÷ 1000 =
  14. 14.238.2 × 1000 =
  15. 15.18.17 × 10 =
  16. 16.3.11 ÷ 1000 =
  17. 17.6.4 × 1000 =
  18. 18.99.8 × 100 =
  19. 19.41.13 × 100 =
  20. 20.18.15 × 1000 =
  21. 21.4.01 × 1000 =
  22. 22.3.86 × 1000 =
  23. 23.484.9 × 1000 =
  24. 24.363.1 ÷ 10 =
  25. 25.366.7 ÷ 100 =
  26. 26.26.83 × 10 =
  27. 27.164.9 × 10 =
  28. 28.19.69 × 1000 =
  29. 29.59.7 ÷ 100 =
  30. 30.279.4 × 100 =
  31. 31.24.7 ÷ 1000 =
  32. 32.38.11 ÷ 1000 =
  33. 33.26.41 ÷ 10 =
  34. 34.35.72 ÷ 10 =
  35. 35.389.8 ÷ 100 =
  36. 36.6.61 × 100 =
  37. 37.37.48 × 10 =
  38. 38.47.55 ÷ 1000 =
  39. 39.45.32 × 1000 =
  40. 40.27.45 × 10 =

Answer key

  1. 39.9
  2. 0.338
  3. 4.748
  4. 45860
  5. 346100
  6. 33650
  7. 4.537
  8. 28690
  9. 73200
  10. 33.29
  11. 1.182
  12. 8.32
  13. 0.03172
  14. 238200
  15. 181.7
  16. 0.00311
  17. 6400
  18. 9980
  19. 4113
  20. 18150
  21. 4010
  22. 3860
  23. 484900
  24. 36.31
  25. 3.667
  26. 268.3
  27. 1649
  28. 19690
  29. 0.597
  30. 27940
  31. 0.0247
  32. 0.03811
  33. 2.641
  34. 3.572
  35. 3.898
  36. 661
  37. 374.8
  38. 0.04755
  39. 45320
  40. 274.5

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