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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 939 · 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. 1.24.7 × 1000 =
  2. 2.21.07 ÷ 100 =
  3. 3.8.8 ÷ 1000 =
  4. 4.216.2 × 1000 =
  5. 5.173.4 ÷ 10 =
  6. 6.27.11 ÷ 10 =
  7. 7.45.81 ÷ 10 =
  8. 8.11.41 × 100 =
  9. 9.141.9 × 1000 =
  10. 10.158.5 × 100 =
  11. 11.257.5 × 10 =
  12. 12.34.87 × 10 =
  13. 13.74.3 × 1000 =
  14. 14.159.8 ÷ 10 =
  15. 15.9.1 ÷ 10 =
  16. 16.117.1 ÷ 100 =
  17. 17.203.8 × 100 =
  18. 18.435.5 ÷ 1000 =
  19. 19.11.69 ÷ 10 =
  20. 20.106.2 × 1000 =
  21. 21.135.2 ÷ 1000 =
  22. 22.245.6 × 100 =
  23. 23.0.79 × 1000 =
  24. 24.99.2 ÷ 1000 =
  25. 25.38.39 ÷ 1000 =
  26. 26.12.21 ÷ 100 =
  27. 27.7.88 × 100 =
  28. 28.163.5 × 100 =
  29. 29.14.59 ÷ 1000 =
  30. 30.374.8 × 10 =
  31. 31.383.1 × 10 =
  32. 32.37.63 ÷ 10 =
  33. 33.228.9 × 1000 =
  34. 34.9.53 ÷ 1000 =
  35. 35.27.41 × 10 =
  36. 36.476.9 × 1000 =
  37. 37.30.55 × 1000 =
  38. 38.389.9 ÷ 100 =
  39. 39.2.82 × 10 =
  40. 40.23.58 ÷ 100 =

Answer key

  1. 24700
  2. 0.2107
  3. 0.0088
  4. 216200
  5. 17.34
  6. 2.711
  7. 4.581
  8. 1141
  9. 141900
  10. 15850
  11. 2575
  12. 348.7
  13. 74300
  14. 15.98
  15. 0.91
  16. 1.171
  17. 20380
  18. 0.4355
  19. 1.169
  20. 106200
  21. 0.1352
  22. 24560
  23. 790
  24. 0.0992
  25. 0.03839
  26. 0.1221
  27. 788
  28. 16350
  29. 0.01459
  30. 3748
  31. 3831
  32. 3.763
  33. 228900
  34. 0.00953
  35. 274.1
  36. 476900
  37. 30550
  38. 3.899
  39. 28.2
  40. 0.2358

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