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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 938 · 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. 1.43.99 × 100 =
  2. 2.2.73 ÷ 10 =
  3. 3.244.5 × 1000 =
  4. 4.194.4 × 1000 =
  5. 5.107.1 × 100 =
  6. 6.164.3 ÷ 1000 =
  7. 7.374.6 ÷ 10 =
  8. 8.7.32 ÷ 10 =
  9. 9.1.01 ÷ 1000 =
  10. 10.41.22 ÷ 1000 =
  11. 11.6.19 × 10 =
  12. 12.31.92 ÷ 10 =
  13. 13.42.43 × 10 =
  14. 14.409.7 × 10 =
  15. 15.368.2 ÷ 10 =
  16. 16.22.58 × 10 =
  17. 17.3.24 × 10 =
  18. 18.16.05 × 10 =
  19. 19.146.5 ÷ 10 =
  20. 20.1.17 ÷ 100 =
  21. 21.445.5 × 10 =
  22. 22.434.2 ÷ 10 =
  23. 23.289.3 × 10 =
  24. 24.5.72 × 10 =
  25. 25.204.3 ÷ 10 =
  26. 26.279.7 ÷ 10 =
  27. 27.7.77 ÷ 100 =
  28. 28.379.8 ÷ 100 =
  29. 29.207.4 ÷ 10 =
  30. 30.117.3 ÷ 1000 =
  31. 31.228.6 ÷ 10 =
  32. 32.38.8 × 10 =
  33. 33.30.26 ÷ 100 =
  34. 34.408.2 ÷ 100 =
  35. 35.343.1 × 10 =
  36. 36.9.51 × 10 =
  37. 37.26.32 ÷ 10 =
  38. 38.188.8 ÷ 100 =
  39. 39.62.2 ÷ 100 =
  40. 40.23.48 × 100 =

Answer key

  1. 4399
  2. 0.273
  3. 244500
  4. 194400
  5. 10710
  6. 0.1643
  7. 37.46
  8. 0.732
  9. 0.00101
  10. 0.04122
  11. 61.9
  12. 3.192
  13. 424.3
  14. 4097
  15. 36.82
  16. 225.8
  17. 32.4
  18. 160.5
  19. 14.65
  20. 0.0117
  21. 4455
  22. 43.42
  23. 2893
  24. 57.2
  25. 20.43
  26. 27.97
  27. 0.0777
  28. 3.798
  29. 20.74
  30. 0.1173
  31. 22.86
  32. 388
  33. 0.3026
  34. 4.082
  35. 3431
  36. 95.1
  37. 2.632
  38. 1.888
  39. 0.622
  40. 2348

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