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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 417 · 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. 1.41.81 ÷ 100 =
  2. 2.59.3 ÷ 10 =
  3. 3.13.07 × 10 =
  4. 4.2.74 ÷ 10 =
  5. 5.183.5 ÷ 100 =
  6. 6.21.87 ÷ 1000 =
  7. 7.112.7 ÷ 10 =
  8. 8.223.6 × 100 =
  9. 9.444.1 ÷ 10 =
  10. 10.106.2 × 100 =
  11. 11.114.1 × 10 =
  12. 12.20.71 ÷ 10 =
  13. 13.18.11 × 10 =
  14. 14.12.9 × 1000 =
  15. 15.42.12 × 1000 =
  16. 16.163.5 × 100 =
  17. 17.225.1 × 100 =
  18. 18.118.4 ÷ 1000 =
  19. 19.262.5 × 100 =
  20. 20.113.4 × 10 =
  21. 21.49.94 ÷ 100 =
  22. 22.27.94 × 1000 =
  23. 23.5.12 × 1000 =
  24. 24.394.9 × 10 =
  25. 25.105.1 × 10 =
  26. 26.40.07 × 100 =
  27. 27.169.6 ÷ 1000 =
  28. 28.335.2 × 10 =
  29. 29.114.4 ÷ 10 =
  30. 30.179.5 × 100 =
  31. 31.368.5 ÷ 100 =
  32. 32.32.85 × 100 =
  33. 33.57.3 ÷ 1000 =
  34. 34.200.8 × 1000 =
  35. 35.452.1 × 100 =
  36. 36.7.2 ÷ 10 =
  37. 37.235.1 × 1000 =
  38. 38.264.5 × 100 =
  39. 39.360.9 × 1000 =
  40. 40.38.88 × 1000 =

Answer key

  1. 0.4181
  2. 5.93
  3. 130.7
  4. 0.274
  5. 1.835
  6. 0.02187
  7. 11.27
  8. 22360
  9. 44.41
  10. 10620
  11. 1141
  12. 2.071
  13. 181.1
  14. 12900
  15. 42120
  16. 16350
  17. 22510
  18. 0.1184
  19. 26250
  20. 1134
  21. 0.4994
  22. 27940
  23. 5120
  24. 3949
  25. 1051
  26. 4007
  27. 0.1696
  28. 3352
  29. 11.44
  30. 17950
  31. 3.685
  32. 3285
  33. 0.0573
  34. 200800
  35. 45210
  36. 0.72
  37. 235100
  38. 26450
  39. 360900
  40. 38880

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