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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 935 · 40 questions
TalentJR

The fast method (Halve first): Halve the number. × 5: multiply the half by 10. × 50: multiply the half by 100. Odd number? Its half ends in .5 — 43 → 21.5 — and × 10 moves the point: 215.

NameDateTime takenScore ___ / 40
  1. 1.57 × 5 =
  2. 2.81 × 50 =
  3. 3.56 × 5 =
  4. 4.35 × 50 =
  5. 5.73 × 5 =
  6. 6.53 × 5 =
  7. 7.68 × 5 =
  8. 8.40 × 5 =
  9. 9.31 × 5 =
  10. 10.66 × 50 =
  11. 11.88 × 50 =
  12. 12.56 × 5 =
  13. 13.25 × 5 =
  14. 14.84 × 5 =
  15. 15.31 × 5 =
  16. 16.89 × 5 =
  17. 17.78 × 5 =
  18. 18.19 × 5 =
  19. 19.90 × 5 =
  20. 20.56 × 50 =
  21. 21.91 × 50 =
  22. 22.64 × 50 =
  23. 23.61 × 50 =
  24. 24.83 × 50 =
  25. 25.50 × 5 =
  26. 26.38 × 5 =
  27. 27.13 × 5 =
  28. 28.16 × 5 =
  29. 29.32 × 5 =
  30. 30.77 × 5 =
  31. 31.13 × 5 =
  32. 32.96 × 50 =
  33. 33.79 × 5 =
  34. 34.32 × 5 =
  35. 35.52 × 50 =
  36. 36.93 × 50 =
  37. 37.61 × 5 =
  38. 38.14 × 50 =
  39. 39.77 × 5 =
  40. 40.61 × 5 =

Answer key

  1. 285
  2. 4050
  3. 280
  4. 1750
  5. 365
  6. 265
  7. 340
  8. 200
  9. 155
  10. 3300
  11. 4400
  12. 280
  13. 125
  14. 420
  15. 155
  16. 445
  17. 390
  18. 95
  19. 450
  20. 2800
  21. 4550
  22. 3200
  23. 3050
  24. 4150
  25. 250
  26. 190
  27. 65
  28. 80
  29. 160
  30. 385
  31. 65
  32. 4800
  33. 395
  34. 160
  35. 2600
  36. 4650
  37. 305
  38. 700
  39. 385
  40. 305

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