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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 656 · 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. 1.91 × 50 =
  2. 2.50 × 50 =
  3. 3.32 × 5 =
  4. 4.23 × 5 =
  5. 5.78 × 50 =
  6. 6.57 × 50 =
  7. 7.54 × 5 =
  8. 8.32 × 5 =
  9. 9.47 × 5 =
  10. 10.39 × 50 =
  11. 11.73 × 50 =
  12. 12.53 × 5 =
  13. 13.40 × 5 =
  14. 14.51 × 50 =
  15. 15.29 × 50 =
  16. 16.24 × 50 =
  17. 17.43 × 5 =
  18. 18.29 × 5 =
  19. 19.65 × 5 =
  20. 20.76 × 5 =
  21. 21.66 × 5 =
  22. 22.48 × 5 =
  23. 23.51 × 50 =
  24. 24.82 × 5 =
  25. 25.21 × 5 =
  26. 26.17 × 50 =
  27. 27.48 × 5 =
  28. 28.35 × 50 =
  29. 29.40 × 50 =
  30. 30.90 × 5 =
  31. 31.29 × 5 =
  32. 32.21 × 5 =
  33. 33.59 × 50 =
  34. 34.43 × 5 =
  35. 35.52 × 50 =
  36. 36.83 × 5 =
  37. 37.16 × 5 =
  38. 38.84 × 5 =
  39. 39.17 × 5 =
  40. 40.95 × 50 =

Answer key

  1. 4550
  2. 2500
  3. 160
  4. 115
  5. 3900
  6. 2850
  7. 270
  8. 160
  9. 235
  10. 1950
  11. 3650
  12. 265
  13. 200
  14. 2550
  15. 1450
  16. 1200
  17. 215
  18. 145
  19. 325
  20. 380
  21. 330
  22. 240
  23. 2550
  24. 410
  25. 105
  26. 850
  27. 240
  28. 1750
  29. 2000
  30. 450
  31. 145
  32. 105
  33. 2950
  34. 215
  35. 2600
  36. 415
  37. 80
  38. 420
  39. 85
  40. 4750

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