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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 638 · 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. 1.89 × 50 =
  2. 2.74 × 50 =
  3. 3.28 × 50 =
  4. 4.78 × 5 =
  5. 5.16 × 50 =
  6. 6.17 × 5 =
  7. 7.54 × 50 =
  8. 8.45 × 5 =
  9. 9.64 × 50 =
  10. 10.53 × 5 =
  11. 11.30 × 50 =
  12. 12.32 × 5 =
  13. 13.47 × 50 =
  14. 14.45 × 50 =
  15. 15.66 × 5 =
  16. 16.66 × 5 =
  17. 17.89 × 5 =
  18. 18.41 × 5 =
  19. 19.31 × 50 =
  20. 20.79 × 5 =
  21. 21.28 × 5 =
  22. 22.95 × 50 =
  23. 23.27 × 50 =
  24. 24.43 × 5 =
  25. 25.64 × 5 =
  26. 26.57 × 50 =
  27. 27.69 × 5 =
  28. 28.60 × 50 =
  29. 29.87 × 50 =
  30. 30.91 × 5 =
  31. 31.28 × 50 =
  32. 32.52 × 5 =
  33. 33.98 × 50 =
  34. 34.78 × 50 =
  35. 35.46 × 5 =
  36. 36.84 × 50 =
  37. 37.71 × 50 =
  38. 38.73 × 50 =
  39. 39.25 × 50 =
  40. 40.59 × 5 =

Answer key

  1. 4450
  2. 3700
  3. 1400
  4. 390
  5. 800
  6. 85
  7. 2700
  8. 225
  9. 3200
  10. 265
  11. 1500
  12. 160
  13. 2350
  14. 2250
  15. 330
  16. 330
  17. 445
  18. 205
  19. 1550
  20. 395
  21. 140
  22. 4750
  23. 1350
  24. 215
  25. 320
  26. 2850
  27. 345
  28. 3000
  29. 4350
  30. 455
  31. 1400
  32. 260
  33. 4900
  34. 3900
  35. 230
  36. 4200
  37. 3550
  38. 3650
  39. 1250
  40. 295

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