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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 121 · 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. 1.101.1 × 1000 =
  2. 2.18.32 × 10 =
  3. 3.41.43 × 10 =
  4. 4.9.98 ÷ 10 =
  5. 5.39.22 × 1000 =
  6. 6.23.11 × 1000 =
  7. 7.122.7 × 10 =
  8. 8.21.22 × 1000 =
  9. 9.266.1 ÷ 1000 =
  10. 10.33.62 × 100 =
  11. 11.104.9 × 100 =
  12. 12.122.5 × 10 =
  13. 13.444.1 ÷ 100 =
  14. 14.197.4 × 10 =
  15. 15.134.1 ÷ 10 =
  16. 16.198.5 × 100 =
  17. 17.37.46 ÷ 10 =
  18. 18.26.7 × 10 =
  19. 19.83.3 × 100 =
  20. 20.26.28 ÷ 10 =
  21. 21.431.1 × 100 =
  22. 22.25.46 × 100 =
  23. 23.38.87 × 1000 =
  24. 24.4.79 × 10 =
  25. 25.436.8 × 1000 =
  26. 26.131.3 × 10 =
  27. 27.347.2 × 10 =
  28. 28.257.1 ÷ 100 =
  29. 29.4.26 × 100 =
  30. 30.103.1 × 10 =
  31. 31.170.1 ÷ 10 =
  32. 32.38.41 × 100 =
  33. 33.1.81 × 1000 =
  34. 34.6.21 × 10 =
  35. 35.11.61 × 100 =
  36. 36.35.04 ÷ 100 =
  37. 37.76.3 × 10 =
  38. 38.63.1 ÷ 10 =
  39. 39.45.79 ÷ 10 =
  40. 40.371.5 × 1000 =

Answer key

  1. 101100
  2. 183.2
  3. 414.3
  4. 0.998
  5. 39220
  6. 23110
  7. 1227
  8. 21220
  9. 0.2661
  10. 3362
  11. 10490
  12. 1225
  13. 4.441
  14. 1974
  15. 13.41
  16. 19850
  17. 3.746
  18. 267
  19. 8330
  20. 2.628
  21. 43110
  22. 2546
  23. 38870
  24. 47.9
  25. 436800
  26. 1313
  27. 3472
  28. 2.571
  29. 426
  30. 1031
  31. 17.01
  32. 3841
  33. 1810
  34. 62.1
  35. 1161
  36. 0.3504
  37. 763
  38. 6.31
  39. 4.579
  40. 371500

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