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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 438 · 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. 1.14.68 × 10 =
  2. 2.37.8 ÷ 1000 =
  3. 3.317.3 × 1000 =
  4. 4.34.37 × 100 =
  5. 5.74.6 ÷ 10 =
  6. 6.240.5 × 1000 =
  7. 7.47.34 × 10 =
  8. 8.34.22 ÷ 10 =
  9. 9.6.5 × 10 =
  10. 10.7.31 ÷ 10 =
  11. 11.47.61 × 10 =
  12. 12.84.8 ÷ 10 =
  13. 13.21.63 × 1000 =
  14. 14.47.42 × 10 =
  15. 15.47.31 ÷ 10 =
  16. 16.24.54 × 100 =
  17. 17.483.5 × 100 =
  18. 18.47.61 ÷ 10 =
  19. 19.275.1 ÷ 10 =
  20. 20.26.51 ÷ 100 =
  21. 21.3.03 × 1000 =
  22. 22.254.4 × 1000 =
  23. 23.4.52 × 100 =
  24. 24.100.1 × 100 =
  25. 25.35.67 ÷ 1000 =
  26. 26.347.1 × 10 =
  27. 27.334.8 × 100 =
  28. 28.1.52 × 10 =
  29. 29.25.06 ÷ 10 =
  30. 30.318.8 × 10 =
  31. 31.33.01 ÷ 1000 =
  32. 32.226.2 ÷ 1000 =
  33. 33.380.4 × 100 =
  34. 34.379.2 × 1000 =
  35. 35.48.23 ÷ 10 =
  36. 36.40.82 ÷ 100 =
  37. 37.40.01 ÷ 1000 =
  38. 38.215.8 × 10 =
  39. 39.6.62 × 1000 =
  40. 40.23.3 × 100 =

Answer key

  1. 146.8
  2. 0.0378
  3. 317300
  4. 3437
  5. 7.46
  6. 240500
  7. 473.4
  8. 3.422
  9. 65
  10. 0.731
  11. 476.1
  12. 8.48
  13. 21630
  14. 474.2
  15. 4.731
  16. 2454
  17. 48350
  18. 4.761
  19. 27.51
  20. 0.2651
  21. 3030
  22. 254400
  23. 452
  24. 10010
  25. 0.03567
  26. 3471
  27. 33480
  28. 15.2
  29. 2.506
  30. 3188
  31. 0.03301
  32. 0.2262
  33. 38040
  34. 379200
  35. 4.823
  36. 0.4082
  37. 0.04001
  38. 2158
  39. 6620
  40. 2330

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