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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 21 · 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. 1.20.29 ÷ 100 =
  2. 2.31.14 ÷ 10 =
  3. 3.286.1 ÷ 10 =
  4. 4.29.4 × 1000 =
  5. 5.332.6 × 1000 =
  6. 6.23.3 ÷ 10 =
  7. 7.47.21 × 10 =
  8. 8.43.09 ÷ 10 =
  9. 9.380.6 ÷ 100 =
  10. 10.123.7 × 100 =
  11. 11.168.1 ÷ 1000 =
  12. 12.168.8 ÷ 1000 =
  13. 13.291.2 × 100 =
  14. 14.37.01 × 100 =
  15. 15.52.5 ÷ 1000 =
  16. 16.130.2 × 100 =
  17. 17.38.74 ÷ 10 =
  18. 18.30.59 × 1000 =
  19. 19.40.4 × 1000 =
  20. 20.133.4 × 100 =
  21. 21.441.7 ÷ 1000 =
  22. 22.153.4 × 1000 =
  23. 23.37.43 ÷ 100 =
  24. 24.172.8 × 100 =
  25. 25.31.13 ÷ 1000 =
  26. 26.271.6 ÷ 10 =
  27. 27.3.62 × 10 =
  28. 28.459.6 × 10 =
  29. 29.393.1 × 100 =
  30. 30.206.7 ÷ 1000 =
  31. 31.319.1 × 1000 =
  32. 32.8.75 × 10 =
  33. 33.129.2 × 1000 =
  34. 34.198.9 ÷ 10 =
  35. 35.94.2 ÷ 100 =
  36. 36.434.7 × 100 =
  37. 37.467.1 ÷ 10 =
  38. 38.169.2 × 1000 =
  39. 39.31.4 × 100 =
  40. 40.97.1 ÷ 1000 =

Answer key

  1. 0.2029
  2. 3.114
  3. 28.61
  4. 29400
  5. 332600
  6. 2.33
  7. 472.1
  8. 4.309
  9. 3.806
  10. 12370
  11. 0.1681
  12. 0.1688
  13. 29120
  14. 3701
  15. 0.0525
  16. 13020
  17. 3.874
  18. 30590
  19. 40400
  20. 13340
  21. 0.4417
  22. 153400
  23. 0.3743
  24. 17280
  25. 0.03113
  26. 27.16
  27. 36.2
  28. 4596
  29. 39310
  30. 0.2067
  31. 319100
  32. 87.5
  33. 129200
  34. 19.89
  35. 0.942
  36. 43470
  37. 46.71
  38. 169200
  39. 3140
  40. 0.0971

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