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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 943 · 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. 1.25.25 × 10 =
  2. 2.11.81 ÷ 1000 =
  3. 3.24.51 × 10 =
  4. 4.393.1 × 100 =
  5. 5.92.4 × 100 =
  6. 6.363.1 ÷ 1000 =
  7. 7.136.3 ÷ 100 =
  8. 8.270.4 × 10 =
  9. 9.38.1 ÷ 10 =
  10. 10.186.1 ÷ 10 =
  11. 11.48.59 ÷ 1000 =
  12. 12.36.76 ÷ 10 =
  13. 13.4.23 × 1000 =
  14. 14.32.24 × 100 =
  15. 15.9.38 × 1000 =
  16. 16.162.9 × 10 =
  17. 17.451.1 ÷ 100 =
  18. 18.28.93 ÷ 1000 =
  19. 19.98.7 × 1000 =
  20. 20.9.26 × 1000 =
  21. 21.197.2 × 1000 =
  22. 22.8.35 ÷ 100 =
  23. 23.46.17 × 10 =
  24. 24.43.96 × 1000 =
  25. 25.458.1 × 100 =
  26. 26.35.61 × 10 =
  27. 27.85.1 ÷ 10 =
  28. 28.8.85 × 100 =
  29. 29.43.18 × 10 =
  30. 30.44.58 × 10 =
  31. 31.0.79 ÷ 10 =
  32. 32.14.62 × 1000 =
  33. 33.35.57 × 10 =
  34. 34.33.29 × 100 =
  35. 35.16.24 ÷ 100 =
  36. 36.12.51 × 1000 =
  37. 37.246.9 × 100 =
  38. 38.6.16 × 10 =
  39. 39.34.71 × 100 =
  40. 40.484.4 × 100 =

Answer key

  1. 252.5
  2. 0.01181
  3. 245.1
  4. 39310
  5. 9240
  6. 0.3631
  7. 1.363
  8. 2704
  9. 3.81
  10. 18.61
  11. 0.04859
  12. 3.676
  13. 4230
  14. 3224
  15. 9380
  16. 1629
  17. 4.511
  18. 0.02893
  19. 98700
  20. 9260
  21. 197200
  22. 0.0835
  23. 461.7
  24. 43960
  25. 45810
  26. 356.1
  27. 8.51
  28. 885
  29. 431.8
  30. 445.8
  31. 0.079
  32. 14620
  33. 355.7
  34. 3329
  35. 0.1624
  36. 12510
  37. 24690
  38. 61.6
  39. 3471
  40. 48440

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