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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 250 · 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. 1.2.99 × 10 =
  2. 2.9.39 × 10 =
  3. 3.31.61 ÷ 10 =
  4. 4.18.86 ÷ 10 =
  5. 5.433.1 × 1000 =
  6. 6.105.1 × 10 =
  7. 7.8.95 ÷ 1000 =
  8. 8.28.66 ÷ 1000 =
  9. 9.36.24 ÷ 1000 =
  10. 10.268.7 × 100 =
  11. 11.28.18 × 100 =
  12. 12.3.84 × 1000 =
  13. 13.348.1 ÷ 10 =
  14. 14.80.7 ÷ 100 =
  15. 15.36.8 × 1000 =
  16. 16.54.4 ÷ 1000 =
  17. 17.54.9 × 1000 =
  18. 18.12.72 × 100 =
  19. 19.228.9 ÷ 1000 =
  20. 20.286.1 × 10 =
  21. 21.463.9 ÷ 10 =
  22. 22.118.1 × 1000 =
  23. 23.12.11 ÷ 10 =
  24. 24.28.98 ÷ 10 =
  25. 25.45.22 × 10 =
  26. 26.42.34 ÷ 1000 =
  27. 27.33.21 ÷ 1000 =
  28. 28.27.01 × 100 =
  29. 29.39.96 × 1000 =
  30. 30.278.4 × 1000 =
  31. 31.370.4 × 100 =
  32. 32.142.1 ÷ 100 =
  33. 33.5.07 ÷ 100 =
  34. 34.415.1 ÷ 10 =
  35. 35.41.72 ÷ 1000 =
  36. 36.3.68 ÷ 10 =
  37. 37.44.9 ÷ 10 =
  38. 38.14.23 × 10 =
  39. 39.136.8 × 1000 =
  40. 40.40.62 × 100 =

Answer key

  1. 29.9
  2. 93.9
  3. 3.161
  4. 1.886
  5. 433100
  6. 1051
  7. 0.00895
  8. 0.02866
  9. 0.03624
  10. 26870
  11. 2818
  12. 3840
  13. 34.81
  14. 0.807
  15. 36800
  16. 0.0544
  17. 54900
  18. 1272
  19. 0.2289
  20. 2861
  21. 46.39
  22. 118100
  23. 1.211
  24. 2.898
  25. 452.2
  26. 0.04234
  27. 0.03321
  28. 2701
  29. 39960
  30. 278400
  31. 37040
  32. 1.421
  33. 0.0507
  34. 41.51
  35. 0.04172
  36. 0.368
  37. 4.49
  38. 142.3
  39. 136800
  40. 4062

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