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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 315 · 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. 1.140.9 × 1000 =
  2. 2.172.5 × 1000 =
  3. 3.450.9 ÷ 100 =
  4. 4.30.95 ÷ 10 =
  5. 5.36.41 × 1000 =
  6. 6.47.8 × 10 =
  7. 7.9.17 ÷ 100 =
  8. 8.319.6 × 1000 =
  9. 9.343.8 × 100 =
  10. 10.253.4 × 100 =
  11. 11.18.71 ÷ 1000 =
  12. 12.3.31 ÷ 10 =
  13. 13.499.9 × 100 =
  14. 14.38.21 × 100 =
  15. 15.18.29 × 10 =
  16. 16.23.45 × 100 =
  17. 17.311.4 ÷ 10 =
  18. 18.4.21 ÷ 1000 =
  19. 19.117.7 × 100 =
  20. 20.42.4 ÷ 100 =
  21. 21.5.49 ÷ 100 =
  22. 22.140.7 ÷ 100 =
  23. 23.214.9 ÷ 100 =
  24. 24.441.1 × 10 =
  25. 25.46.61 ÷ 1000 =
  26. 26.25.85 × 100 =
  27. 27.15.32 × 100 =
  28. 28.6.05 ÷ 1000 =
  29. 29.499.3 × 1000 =
  30. 30.26.09 × 10 =
  31. 31.105.1 ÷ 1000 =
  32. 32.214.6 × 1000 =
  33. 33.9.87 × 1000 =
  34. 34.36.57 × 10 =
  35. 35.139.6 ÷ 10 =
  36. 36.42.12 × 10 =
  37. 37.220.8 × 10 =
  38. 38.33.32 × 100 =
  39. 39.268.3 ÷ 10 =
  40. 40.26.68 × 1000 =

Answer key

  1. 140900
  2. 172500
  3. 4.509
  4. 3.095
  5. 36410
  6. 478
  7. 0.0917
  8. 319600
  9. 34380
  10. 25340
  11. 0.01871
  12. 0.331
  13. 49990
  14. 3821
  15. 182.9
  16. 2345
  17. 31.14
  18. 0.00421
  19. 11770
  20. 0.424
  21. 0.0549
  22. 1.407
  23. 2.149
  24. 4411
  25. 0.04661
  26. 2585
  27. 1532
  28. 0.00605
  29. 499300
  30. 260.9
  31. 0.1051
  32. 214600
  33. 9870
  34. 365.7
  35. 13.96
  36. 421.2
  37. 2208
  38. 3332
  39. 26.83
  40. 26680

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