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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 734 · 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. 1.121.5 × 1000 =
  2. 2.49.85 ÷ 100 =
  3. 3.1.77 ÷ 10 =
  4. 4.37.42 ÷ 100 =
  5. 5.47.04 × 1000 =
  6. 6.8.21 ÷ 1000 =
  7. 7.14.21 ÷ 100 =
  8. 8.36.41 × 10 =
  9. 9.493.2 × 10 =
  10. 10.419.8 ÷ 1000 =
  11. 11.174.4 × 10 =
  12. 12.36.36 × 1000 =
  13. 13.453.3 ÷ 100 =
  14. 14.49.04 × 1000 =
  15. 15.378.9 × 1000 =
  16. 16.15.19 ÷ 100 =
  17. 17.9.23 ÷ 100 =
  18. 18.26.05 ÷ 10 =
  19. 19.2.21 ÷ 10 =
  20. 20.30.91 ÷ 100 =
  21. 21.178.7 ÷ 1000 =
  22. 22.389.3 ÷ 1000 =
  23. 23.173.2 ÷ 1000 =
  24. 24.480.6 × 10 =
  25. 25.14.96 × 100 =
  26. 26.41.56 × 1000 =
  27. 27.25.54 ÷ 10 =
  28. 28.8.46 × 10 =
  29. 29.17.18 ÷ 100 =
  30. 30.99.1 × 1000 =
  31. 31.409.4 × 1000 =
  32. 32.7.3 × 10 =
  33. 33.0.14 × 10 =
  34. 34.219.2 × 100 =
  35. 35.45.02 × 100 =
  36. 36.11.58 ÷ 10 =
  37. 37.46.09 ÷ 100 =
  38. 38.40.09 ÷ 100 =
  39. 39.42.26 × 10 =
  40. 40.242.2 × 100 =

Answer key

  1. 121500
  2. 0.4985
  3. 0.177
  4. 0.3742
  5. 47040
  6. 0.00821
  7. 0.1421
  8. 364.1
  9. 4932
  10. 0.4198
  11. 1744
  12. 36360
  13. 4.533
  14. 49040
  15. 378900
  16. 0.1519
  17. 0.0923
  18. 2.605
  19. 0.221
  20. 0.3091
  21. 0.1787
  22. 0.3893
  23. 0.1732
  24. 4806
  25. 1496
  26. 41560
  27. 2.554
  28. 84.6
  29. 0.1718
  30. 99100
  31. 409400
  32. 73
  33. 1.4
  34. 21920
  35. 4502
  36. 1.158
  37. 0.4609
  38. 0.4009
  39. 422.6
  40. 24220

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