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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 788 · 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. 1.208.5 ÷ 10 =
  2. 2.13.52 × 10 =
  3. 3.490.6 × 10 =
  4. 4.228.2 × 1000 =
  5. 5.8.02 × 100 =
  6. 6.0.58 ÷ 1000 =
  7. 7.23.91 ÷ 1000 =
  8. 8.254.3 ÷ 100 =
  9. 9.321.1 × 1000 =
  10. 10.10.13 × 10 =
  11. 11.43.89 × 10 =
  12. 12.49.63 × 1000 =
  13. 13.46.39 × 10 =
  14. 14.46.81 ÷ 10 =
  15. 15.186.5 × 100 =
  16. 16.0.51 ÷ 1000 =
  17. 17.22.31 × 100 =
  18. 18.25.72 × 10 =
  19. 19.253.4 × 1000 =
  20. 20.29.76 × 10 =
  21. 21.12.42 ÷ 100 =
  22. 22.309.1 × 1000 =
  23. 23.384.6 × 1000 =
  24. 24.454.7 ÷ 10 =
  25. 25.67.6 ÷ 100 =
  26. 26.49.89 ÷ 10 =
  27. 27.113.1 ÷ 1000 =
  28. 28.91.5 ÷ 10 =
  29. 29.469.9 ÷ 1000 =
  30. 30.87.1 × 10 =
  31. 31.1.54 × 10 =
  32. 32.20.27 ÷ 10 =
  33. 33.372.7 × 10 =
  34. 34.366.6 × 100 =
  35. 35.311.5 × 1000 =
  36. 36.3.7 × 10 =
  37. 37.8.32 ÷ 10 =
  38. 38.45.76 × 10 =
  39. 39.276.4 ÷ 10 =
  40. 40.248.5 ÷ 1000 =

Answer key

  1. 20.85
  2. 135.2
  3. 4906
  4. 228200
  5. 802
  6. 0.00058
  7. 0.02391
  8. 2.543
  9. 321100
  10. 101.3
  11. 438.9
  12. 49630
  13. 463.9
  14. 4.681
  15. 18650
  16. 0.00051
  17. 2231
  18. 257.2
  19. 253400
  20. 297.6
  21. 0.1242
  22. 309100
  23. 384600
  24. 45.47
  25. 0.676
  26. 4.989
  27. 0.1131
  28. 9.15
  29. 0.4699
  30. 871
  31. 15.4
  32. 2.027
  33. 3727
  34. 36660
  35. 311500
  36. 37
  37. 0.832
  38. 457.6
  39. 27.64
  40. 0.2485

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