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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 731 · 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. 1.45.05 ÷ 10 =
  2. 2.30.28 × 10 =
  3. 3.18.21 ÷ 10 =
  4. 4.133.1 ÷ 100 =
  5. 5.0.86 × 1000 =
  6. 6.12.97 ÷ 100 =
  7. 7.40.65 ÷ 10 =
  8. 8.17.54 × 100 =
  9. 9.43.54 × 10 =
  10. 10.43.7 ÷ 10 =
  11. 11.47.23 ÷ 100 =
  12. 12.48.94 × 100 =
  13. 13.8.24 × 1000 =
  14. 14.476.2 ÷ 10 =
  15. 15.10.16 × 100 =
  16. 16.38.07 × 10 =
  17. 17.48.9 × 100 =
  18. 18.28.7 × 100 =
  19. 19.28.75 ÷ 10 =
  20. 20.163.9 ÷ 10 =
  21. 21.239.8 ÷ 100 =
  22. 22.21.85 ÷ 100 =
  23. 23.483.1 ÷ 10 =
  24. 24.50.3 × 10 =
  25. 25.338.1 × 10 =
  26. 26.462.8 × 1000 =
  27. 27.12.65 × 1000 =
  28. 28.133.8 × 10 =
  29. 29.101.3 × 100 =
  30. 30.0.92 × 10 =
  31. 31.272.6 × 10 =
  32. 32.9.66 ÷ 100 =
  33. 33.12.81 × 10 =
  34. 34.17.26 ÷ 1000 =
  35. 35.48.23 × 10 =
  36. 36.113.1 ÷ 100 =
  37. 37.24.6 × 1000 =
  38. 38.112.1 × 100 =
  39. 39.4.82 ÷ 1000 =
  40. 40.30.86 ÷ 1000 =

Answer key

  1. 4.505
  2. 302.8
  3. 1.821
  4. 1.331
  5. 860
  6. 0.1297
  7. 4.065
  8. 1754
  9. 435.4
  10. 4.37
  11. 0.4723
  12. 4894
  13. 8240
  14. 47.62
  15. 1016
  16. 380.7
  17. 4890
  18. 2870
  19. 2.875
  20. 16.39
  21. 2.398
  22. 0.2185
  23. 48.31
  24. 503
  25. 3381
  26. 462800
  27. 12650
  28. 1338
  29. 10130
  30. 9.2
  31. 2726
  32. 0.0966
  33. 128.1
  34. 0.01726
  35. 482.3
  36. 1.131
  37. 24600
  38. 11210
  39. 0.00482
  40. 0.03086

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