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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 994 · 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. 1.81.1 × 100 =
  2. 2.0.12 × 100 =
  3. 3.409.6 ÷ 10 =
  4. 4.305.5 ÷ 10 =
  5. 5.7.58 × 10 =
  6. 6.433.2 × 100 =
  7. 7.19.23 × 100 =
  8. 8.131.5 × 100 =
  9. 9.19.95 × 10 =
  10. 10.81.1 × 10 =
  11. 11.18.64 ÷ 10 =
  12. 12.17.78 × 10 =
  13. 13.239.2 × 10 =
  14. 14.299.8 ÷ 100 =
  15. 15.22.67 × 1000 =
  16. 16.44.79 ÷ 100 =
  17. 17.11.16 ÷ 100 =
  18. 18.439.2 ÷ 1000 =
  19. 19.30.07 × 10 =
  20. 20.184.9 × 1000 =
  21. 21.8.02 ÷ 10 =
  22. 22.236.9 ÷ 10 =
  23. 23.39.19 ÷ 1000 =
  24. 24.19.28 × 1000 =
  25. 25.29.5 ÷ 10 =
  26. 26.34.29 × 10 =
  27. 27.165.2 ÷ 1000 =
  28. 28.182.3 × 100 =
  29. 29.42.64 ÷ 100 =
  30. 30.165.2 ÷ 10 =
  31. 31.8.1 × 100 =
  32. 32.230.9 × 100 =
  33. 33.8.47 ÷ 1000 =
  34. 34.39.47 × 10 =
  35. 35.20.06 × 1000 =
  36. 36.22.91 × 100 =
  37. 37.32.3 × 1000 =
  38. 38.17.72 × 10 =
  39. 39.5.77 × 100 =
  40. 40.411.4 × 10 =

Answer key

  1. 8110
  2. 12
  3. 40.96
  4. 30.55
  5. 75.8
  6. 43320
  7. 1923
  8. 13150
  9. 199.5
  10. 811
  11. 1.864
  12. 177.8
  13. 2392
  14. 2.998
  15. 22670
  16. 0.4479
  17. 0.1116
  18. 0.4392
  19. 300.7
  20. 184900
  21. 0.802
  22. 23.69
  23. 0.03919
  24. 19280
  25. 2.95
  26. 342.9
  27. 0.1652
  28. 18230
  29. 0.4264
  30. 16.52
  31. 810
  32. 23090
  33. 0.00847
  34. 394.7
  35. 20060
  36. 2291
  37. 32300
  38. 177.2
  39. 577
  40. 4114

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