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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 364 · 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. 1.35.5 × 100 =
  2. 2.323.9 ÷ 100 =
  3. 3.237.1 ÷ 10 =
  4. 4.169.1 × 10 =
  5. 5.46.01 ÷ 100 =
  6. 6.360.6 ÷ 100 =
  7. 7.262.1 ÷ 10 =
  8. 8.12.41 ÷ 10 =
  9. 9.21.21 ÷ 10 =
  10. 10.101.1 ÷ 10 =
  11. 11.113.1 ÷ 10 =
  12. 12.385.1 ÷ 1000 =
  13. 13.46.01 ÷ 10 =
  14. 14.211.5 ÷ 1000 =
  15. 15.2.45 × 100 =
  16. 16.36.79 ÷ 1000 =
  17. 17.12.78 ÷ 1000 =
  18. 18.437.6 × 10 =
  19. 19.23.96 ÷ 10 =
  20. 20.368.6 × 1000 =
  21. 21.353.4 × 1000 =
  22. 22.160.5 × 10 =
  23. 23.296.1 ÷ 10 =
  24. 24.74.7 ÷ 100 =
  25. 25.35.28 × 10 =
  26. 26.437.5 ÷ 1000 =
  27. 27.376.1 × 100 =
  28. 28.41.7 ÷ 10 =
  29. 29.221.9 ÷ 10 =
  30. 30.70.5 × 1000 =
  31. 31.6.45 ÷ 100 =
  32. 32.40.54 × 10 =
  33. 33.424.3 ÷ 100 =
  34. 34.482.1 × 100 =
  35. 35.435.6 × 10 =
  36. 36.46.21 × 1000 =
  37. 37.10.61 × 10 =
  38. 38.14.09 × 1000 =
  39. 39.10.04 × 10 =
  40. 40.252.5 × 1000 =

Answer key

  1. 3550
  2. 3.239
  3. 23.71
  4. 1691
  5. 0.4601
  6. 3.606
  7. 26.21
  8. 1.241
  9. 2.121
  10. 10.11
  11. 11.31
  12. 0.3851
  13. 4.601
  14. 0.2115
  15. 245
  16. 0.03679
  17. 0.01278
  18. 4376
  19. 2.396
  20. 368600
  21. 353400
  22. 1605
  23. 29.61
  24. 0.747
  25. 352.8
  26. 0.4375
  27. 37610
  28. 4.17
  29. 22.19
  30. 70500
  31. 0.0645
  32. 405.4
  33. 4.243
  34. 48210
  35. 4356
  36. 46210
  37. 106.1
  38. 14090
  39. 100.4
  40. 252500

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