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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 504 · 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. 1.460.7 × 10 =
  2. 2.8.24 × 1000 =
  3. 3.10.01 ÷ 1000 =
  4. 4.450.4 × 1000 =
  5. 5.32.25 × 100 =
  6. 6.76.1 × 10 =
  7. 7.32.12 ÷ 100 =
  8. 8.31.84 ÷ 100 =
  9. 9.40.88 ÷ 100 =
  10. 10.46.43 ÷ 100 =
  11. 11.16.42 ÷ 1000 =
  12. 12.28.03 × 10 =
  13. 13.10.43 ÷ 100 =
  14. 14.47.84 × 1000 =
  15. 15.0.83 × 1000 =
  16. 16.442.1 × 100 =
  17. 17.11.45 × 10 =
  18. 18.46.68 × 1000 =
  19. 19.280.7 × 10 =
  20. 20.23.91 × 100 =
  21. 21.9.76 × 10 =
  22. 22.11.83 × 100 =
  23. 23.29.61 × 1000 =
  24. 24.148.8 ÷ 10 =
  25. 25.36.65 × 1000 =
  26. 26.316.2 × 10 =
  27. 27.497.3 ÷ 1000 =
  28. 28.481.7 ÷ 10 =
  29. 29.7.92 ÷ 1000 =
  30. 30.357.3 ÷ 10 =
  31. 31.118.5 × 1000 =
  32. 32.125.5 ÷ 100 =
  33. 33.40.32 × 1000 =
  34. 34.41.91 × 100 =
  35. 35.129.3 ÷ 100 =
  36. 36.109.6 × 100 =
  37. 37.379.4 × 1000 =
  38. 38.318.8 × 1000 =
  39. 39.344.5 ÷ 100 =
  40. 40.22.64 × 1000 =

Answer key

  1. 4607
  2. 8240
  3. 0.01001
  4. 450400
  5. 3225
  6. 761
  7. 0.3212
  8. 0.3184
  9. 0.4088
  10. 0.4643
  11. 0.01642
  12. 280.3
  13. 0.1043
  14. 47840
  15. 830
  16. 44210
  17. 114.5
  18. 46680
  19. 2807
  20. 2391
  21. 97.6
  22. 1183
  23. 29610
  24. 14.88
  25. 36650
  26. 3162
  27. 0.4973
  28. 48.17
  29. 0.00792
  30. 35.73
  31. 118500
  32. 1.255
  33. 40320
  34. 4191
  35. 1.293
  36. 10960
  37. 379400
  38. 318800
  39. 3.445
  40. 22640

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