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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 830 · 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. 1.83.8 × 10 =
  2. 2.34.91 × 10 =
  3. 3.123.5 ÷ 100 =
  4. 4.337.9 × 100 =
  5. 5.497.6 × 10 =
  6. 6.422.7 × 10 =
  7. 7.18.51 × 1000 =
  8. 8.32.09 × 100 =
  9. 9.16.4 ÷ 1000 =
  10. 10.19.45 × 10 =
  11. 11.236.2 × 1000 =
  12. 12.308.5 × 1000 =
  13. 13.5.97 × 1000 =
  14. 14.320.1 × 10 =
  15. 15.1.35 × 10 =
  16. 16.246.1 ÷ 100 =
  17. 17.329.5 ÷ 10 =
  18. 18.304.1 × 1000 =
  19. 19.40.4 × 100 =
  20. 20.320.6 × 10 =
  21. 21.121.7 ÷ 1000 =
  22. 22.42.31 × 100 =
  23. 23.30.21 × 10 =
  24. 24.39.39 × 100 =
  25. 25.43.81 ÷ 100 =
  26. 26.6.26 ÷ 1000 =
  27. 27.165.2 × 100 =
  28. 28.18.57 ÷ 100 =
  29. 29.437.1 ÷ 100 =
  30. 30.393.5 ÷ 1000 =
  31. 31.3.95 ÷ 10 =
  32. 32.3.91 ÷ 1000 =
  33. 33.483.6 ÷ 10 =
  34. 34.42.59 ÷ 1000 =
  35. 35.95.9 × 1000 =
  36. 36.26.08 ÷ 100 =
  37. 37.436.2 ÷ 10 =
  38. 38.223.7 × 1000 =
  39. 39.1.87 ÷ 10 =
  40. 40.24.51 ÷ 1000 =

Answer key

  1. 838
  2. 349.1
  3. 1.235
  4. 33790
  5. 4976
  6. 4227
  7. 18510
  8. 3209
  9. 0.0164
  10. 194.5
  11. 236200
  12. 308500
  13. 5970
  14. 3201
  15. 13.5
  16. 2.461
  17. 32.95
  18. 304100
  19. 4040
  20. 3206
  21. 0.1217
  22. 4231
  23. 302.1
  24. 3939
  25. 0.4381
  26. 0.00626
  27. 16520
  28. 0.1857
  29. 4.371
  30. 0.3935
  31. 0.395
  32. 0.00391
  33. 48.36
  34. 0.04259
  35. 95900
  36. 0.2608
  37. 43.62
  38. 223700
  39. 0.187
  40. 0.02451

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