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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 947 · 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. 1.38 × 50 =
  2. 2.18 × 5 =
  3. 3.57 × 50 =
  4. 4.85 × 5 =
  5. 5.42 × 50 =
  6. 6.68 × 50 =
  7. 7.44 × 50 =
  8. 8.21 × 50 =
  9. 9.83 × 50 =
  10. 10.79 × 50 =
  11. 11.80 × 5 =
  12. 12.58 × 5 =
  13. 13.22 × 50 =
  14. 14.29 × 50 =
  15. 15.89 × 5 =
  16. 16.37 × 50 =
  17. 17.66 × 5 =
  18. 18.86 × 50 =
  19. 19.28 × 50 =
  20. 20.43 × 5 =
  21. 21.13 × 50 =
  22. 22.55 × 50 =
  23. 23.35 × 50 =
  24. 24.87 × 5 =
  25. 25.18 × 5 =
  26. 26.89 × 50 =
  27. 27.55 × 50 =
  28. 28.95 × 5 =
  29. 29.59 × 5 =
  30. 30.86 × 5 =
  31. 31.90 × 5 =
  32. 32.98 × 50 =
  33. 33.70 × 5 =
  34. 34.25 × 5 =
  35. 35.46 × 50 =
  36. 36.29 × 5 =
  37. 37.87 × 5 =
  38. 38.74 × 50 =
  39. 39.85 × 5 =
  40. 40.72 × 5 =

Answer key

  1. 1900
  2. 90
  3. 2850
  4. 425
  5. 2100
  6. 3400
  7. 2200
  8. 1050
  9. 4150
  10. 3950
  11. 400
  12. 290
  13. 1100
  14. 1450
  15. 445
  16. 1850
  17. 330
  18. 4300
  19. 1400
  20. 215
  21. 650
  22. 2750
  23. 1750
  24. 435
  25. 90
  26. 4450
  27. 2750
  28. 475
  29. 295
  30. 430
  31. 450
  32. 4900
  33. 350
  34. 125
  35. 2300
  36. 145
  37. 435
  38. 3700
  39. 425
  40. 360

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