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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 839 · 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. 1.372.6 × 10 =
  2. 2.486.9 × 10 =
  3. 3.17.24 × 10 =
  4. 4.125.7 × 1000 =
  5. 5.13.23 ÷ 100 =
  6. 6.73.3 × 10 =
  7. 7.49.71 × 100 =
  8. 8.479.8 × 1000 =
  9. 9.49.21 × 10 =
  10. 10.68.9 ÷ 1000 =
  11. 11.263.1 × 1000 =
  12. 12.21.94 × 10 =
  13. 13.19.07 × 10 =
  14. 14.5.1 × 10 =
  15. 15.166.3 × 10 =
  16. 16.489.8 ÷ 1000 =
  17. 17.34.87 × 100 =
  18. 18.186.3 ÷ 1000 =
  19. 19.105.3 × 1000 =
  20. 20.175.2 ÷ 1000 =
  21. 21.33.82 × 100 =
  22. 22.31.64 ÷ 1000 =
  23. 23.249.8 × 10 =
  24. 24.113.1 × 1000 =
  25. 25.75.1 ÷ 1000 =
  26. 26.39.51 ÷ 100 =
  27. 27.2.98 ÷ 10 =
  28. 28.35.63 × 10 =
  29. 29.95.5 ÷ 10 =
  30. 30.40.73 × 100 =
  31. 31.37.31 ÷ 10 =
  32. 32.35.32 × 10 =
  33. 33.89.7 × 10 =
  34. 34.47.59 ÷ 10 =
  35. 35.364.8 × 10 =
  36. 36.11.88 × 1000 =
  37. 37.241.1 ÷ 10 =
  38. 38.380.2 ÷ 10 =
  39. 39.14.04 ÷ 1000 =
  40. 40.20.69 ÷ 1000 =

Answer key

  1. 3726
  2. 4869
  3. 172.4
  4. 125700
  5. 0.1323
  6. 733
  7. 4971
  8. 479800
  9. 492.1
  10. 0.0689
  11. 263100
  12. 219.4
  13. 190.7
  14. 51
  15. 1663
  16. 0.4898
  17. 3487
  18. 0.1863
  19. 105300
  20. 0.1752
  21. 3382
  22. 0.03164
  23. 2498
  24. 113100
  25. 0.0751
  26. 0.3951
  27. 0.298
  28. 356.3
  29. 9.55
  30. 4073
  31. 3.731
  32. 353.2
  33. 897
  34. 4.759
  35. 3648
  36. 11880
  37. 24.11
  38. 38.02
  39. 0.01404
  40. 0.02069

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