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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 761 · 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. 1.43 × 5 =
  2. 2.23 × 5 =
  3. 3.49 × 50 =
  4. 4.29 × 5 =
  5. 5.78 × 5 =
  6. 6.48 × 5 =
  7. 7.37 × 50 =
  8. 8.78 × 50 =
  9. 9.77 × 50 =
  10. 10.58 × 5 =
  11. 11.33 × 5 =
  12. 12.12 × 5 =
  13. 13.54 × 50 =
  14. 14.38 × 5 =
  15. 15.52 × 5 =
  16. 16.18 × 50 =
  17. 17.57 × 50 =
  18. 18.26 × 50 =
  19. 19.68 × 50 =
  20. 20.36 × 50 =
  21. 21.21 × 5 =
  22. 22.47 × 50 =
  23. 23.17 × 50 =
  24. 24.62 × 50 =
  25. 25.63 × 50 =
  26. 26.70 × 5 =
  27. 27.49 × 5 =
  28. 28.94 × 5 =
  29. 29.15 × 50 =
  30. 30.81 × 50 =
  31. 31.28 × 5 =
  32. 32.25 × 50 =
  33. 33.76 × 50 =
  34. 34.39 × 5 =
  35. 35.40 × 5 =
  36. 36.29 × 50 =
  37. 37.59 × 5 =
  38. 38.23 × 50 =
  39. 39.19 × 5 =
  40. 40.81 × 5 =

Answer key

  1. 215
  2. 115
  3. 2450
  4. 145
  5. 390
  6. 240
  7. 1850
  8. 3900
  9. 3850
  10. 290
  11. 165
  12. 60
  13. 2700
  14. 190
  15. 260
  16. 900
  17. 2850
  18. 1300
  19. 3400
  20. 1800
  21. 105
  22. 2350
  23. 850
  24. 3100
  25. 3150
  26. 350
  27. 245
  28. 470
  29. 750
  30. 4050
  31. 140
  32. 1250
  33. 3800
  34. 195
  35. 200
  36. 1450
  37. 295
  38. 1150
  39. 95
  40. 405

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