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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 88 · 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. 1.158.4 × 1000 =
  2. 2.76.1 ÷ 10 =
  3. 3.28.05 ÷ 10 =
  4. 4.167.6 × 100 =
  5. 5.6.93 ÷ 100 =
  6. 6.161.1 ÷ 10 =
  7. 7.450.5 × 1000 =
  8. 8.108.1 ÷ 1000 =
  9. 9.259.3 ÷ 10 =
  10. 10.312.1 × 100 =
  11. 11.12.69 ÷ 10 =
  12. 12.44.2 × 10 =
  13. 13.373.4 ÷ 10 =
  14. 14.17.9 ÷ 100 =
  15. 15.161.4 × 100 =
  16. 16.11.48 ÷ 100 =
  17. 17.12.75 × 10 =
  18. 18.386.9 × 10 =
  19. 19.11.71 × 100 =
  20. 20.0.64 × 10 =
  21. 21.34.36 × 100 =
  22. 22.279.8 × 100 =
  23. 23.361.7 × 10 =
  24. 24.228.2 ÷ 100 =
  25. 25.23.54 ÷ 1000 =
  26. 26.398.2 ÷ 10 =
  27. 27.21.63 × 100 =
  28. 28.218.4 × 100 =
  29. 29.280.1 × 1000 =
  30. 30.55.3 × 100 =
  31. 31.4.04 × 1000 =
  32. 32.132.8 × 1000 =
  33. 33.84.9 ÷ 10 =
  34. 34.30.91 × 1000 =
  35. 35.303.1 ÷ 10 =
  36. 36.17.8 ÷ 1000 =
  37. 37.439.1 × 1000 =
  38. 38.36.79 ÷ 10 =
  39. 39.4.36 × 10 =
  40. 40.35.98 × 1000 =

Answer key

  1. 158400
  2. 7.61
  3. 2.805
  4. 16760
  5. 0.0693
  6. 16.11
  7. 450500
  8. 0.1081
  9. 25.93
  10. 31210
  11. 1.269
  12. 442
  13. 37.34
  14. 0.179
  15. 16140
  16. 0.1148
  17. 127.5
  18. 3869
  19. 1171
  20. 6.4
  21. 3436
  22. 27980
  23. 3617
  24. 2.282
  25. 0.02354
  26. 39.82
  27. 2163
  28. 21840
  29. 280100
  30. 5530
  31. 4040
  32. 132800
  33. 8.49
  34. 30910
  35. 30.31
  36. 0.0178
  37. 439100
  38. 3.679
  39. 43.6
  40. 35980

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