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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 200 · 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. 1.169.1 ÷ 1000 =
  2. 2.212.3 ÷ 1000 =
  3. 3.19.09 × 1000 =
  4. 4.228.4 ÷ 10 =
  5. 5.106.4 × 100 =
  6. 6.381.2 ÷ 100 =
  7. 7.156.5 × 1000 =
  8. 8.164.4 ÷ 100 =
  9. 9.44.1 ÷ 1000 =
  10. 10.43.11 × 100 =
  11. 11.266.3 ÷ 10 =
  12. 12.90.6 ÷ 1000 =
  13. 13.22.63 × 10 =
  14. 14.272.8 × 1000 =
  15. 15.31.15 ÷ 100 =
  16. 16.12.43 ÷ 10 =
  17. 17.1.78 × 10 =
  18. 18.28.51 ÷ 100 =
  19. 19.118.4 ÷ 1000 =
  20. 20.135.7 × 1000 =
  21. 21.424.1 ÷ 100 =
  22. 22.200.8 ÷ 100 =
  23. 23.3.18 ÷ 100 =
  24. 24.55.5 ÷ 1000 =
  25. 25.48.88 × 1000 =
  26. 26.12.1 ÷ 10 =
  27. 27.450.7 × 100 =
  28. 28.296.7 ÷ 1000 =
  29. 29.8.1 ÷ 100 =
  30. 30.17.01 × 100 =
  31. 31.9.02 × 1000 =
  32. 32.97.1 ÷ 100 =
  33. 33.15.35 × 10 =
  34. 34.46.56 ÷ 10 =
  35. 35.228.8 ÷ 1000 =
  36. 36.401.6 × 1000 =
  37. 37.21.41 × 1000 =
  38. 38.383.6 ÷ 100 =
  39. 39.4.11 × 100 =
  40. 40.20.21 × 10 =

Answer key

  1. 0.1691
  2. 0.2123
  3. 19090
  4. 22.84
  5. 10640
  6. 3.812
  7. 156500
  8. 1.644
  9. 0.0441
  10. 4311
  11. 26.63
  12. 0.0906
  13. 226.3
  14. 272800
  15. 0.3115
  16. 1.243
  17. 17.8
  18. 0.2851
  19. 0.1184
  20. 135700
  21. 4.241
  22. 2.008
  23. 0.0318
  24. 0.0555
  25. 48880
  26. 1.21
  27. 45070
  28. 0.2967
  29. 0.081
  30. 1701
  31. 9020
  32. 0.971
  33. 153.5
  34. 4.656
  35. 0.2288
  36. 401600
  37. 21410
  38. 3.836
  39. 411
  40. 202.1

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