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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 842 · 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. 1.104.1 × 10 =
  2. 2.400.2 ÷ 1000 =
  3. 3.25.19 × 10 =
  4. 4.12.02 ÷ 1000 =
  5. 5.204.9 ÷ 10 =
  6. 6.48.3 ÷ 1000 =
  7. 7.249.9 × 1000 =
  8. 8.21.37 ÷ 1000 =
  9. 9.20.29 × 100 =
  10. 10.124.5 × 100 =
  11. 11.14.01 × 1000 =
  12. 12.37.63 ÷ 100 =
  13. 13.6.13 ÷ 10 =
  14. 14.28.21 ÷ 10 =
  15. 15.22.91 ÷ 1000 =
  16. 16.262.9 ÷ 10 =
  17. 17.9.99 × 10 =
  18. 18.16.31 ÷ 1000 =
  19. 19.14.49 ÷ 10 =
  20. 20.19.19 × 100 =
  21. 21.384.7 × 1000 =
  22. 22.20.63 × 100 =
  23. 23.124.1 ÷ 1000 =
  24. 24.20.76 × 1000 =
  25. 25.316.5 ÷ 1000 =
  26. 26.1.5 ÷ 100 =
  27. 27.17.6 × 100 =
  28. 28.22.62 × 100 =
  29. 29.19.6 × 100 =
  30. 30.38.08 × 100 =
  31. 31.40.69 ÷ 10 =
  32. 32.46.4 ÷ 10 =
  33. 33.10.55 × 1000 =
  34. 34.145.5 ÷ 100 =
  35. 35.205.2 × 100 =
  36. 36.49.23 × 100 =
  37. 37.30.13 ÷ 1000 =
  38. 38.49.11 ÷ 10 =
  39. 39.345.2 × 100 =
  40. 40.24.56 ÷ 10 =

Answer key

  1. 1041
  2. 0.4002
  3. 251.9
  4. 0.01202
  5. 20.49
  6. 0.0483
  7. 249900
  8. 0.02137
  9. 2029
  10. 12450
  11. 14010
  12. 0.3763
  13. 0.613
  14. 2.821
  15. 0.02291
  16. 26.29
  17. 99.9
  18. 0.01631
  19. 1.449
  20. 1919
  21. 384700
  22. 2063
  23. 0.1241
  24. 20760
  25. 0.3165
  26. 0.015
  27. 1760
  28. 2262
  29. 1960
  30. 3808
  31. 4.069
  32. 4.64
  33. 10550
  34. 1.455
  35. 20520
  36. 4923
  37. 0.03013
  38. 4.911
  39. 34520
  40. 2.456

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