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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 579 · 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. 1.46 × 5 =
  2. 2.22 × 50 =
  3. 3.90 × 5 =
  4. 4.71 × 5 =
  5. 5.22 × 5 =
  6. 6.18 × 5 =
  7. 7.64 × 5 =
  8. 8.23 × 5 =
  9. 9.33 × 50 =
  10. 10.86 × 5 =
  11. 11.58 × 5 =
  12. 12.97 × 50 =
  13. 13.48 × 50 =
  14. 14.36 × 5 =
  15. 15.18 × 50 =
  16. 16.77 × 50 =
  17. 17.19 × 50 =
  18. 18.66 × 5 =
  19. 19.40 × 5 =
  20. 20.94 × 50 =
  21. 21.51 × 5 =
  22. 22.97 × 5 =
  23. 23.30 × 5 =
  24. 24.49 × 50 =
  25. 25.79 × 50 =
  26. 26.50 × 5 =
  27. 27.80 × 5 =
  28. 28.65 × 5 =
  29. 29.74 × 50 =
  30. 30.52 × 50 =
  31. 31.16 × 5 =
  32. 32.76 × 50 =
  33. 33.71 × 50 =
  34. 34.28 × 5 =
  35. 35.16 × 50 =
  36. 36.22 × 50 =
  37. 37.86 × 5 =
  38. 38.55 × 5 =
  39. 39.35 × 5 =
  40. 40.36 × 50 =

Answer key

  1. 230
  2. 1100
  3. 450
  4. 355
  5. 110
  6. 90
  7. 320
  8. 115
  9. 1650
  10. 430
  11. 290
  12. 4850
  13. 2400
  14. 180
  15. 900
  16. 3850
  17. 950
  18. 330
  19. 200
  20. 4700
  21. 255
  22. 485
  23. 150
  24. 2450
  25. 3950
  26. 250
  27. 400
  28. 325
  29. 3700
  30. 2600
  31. 80
  32. 3800
  33. 3550
  34. 140
  35. 800
  36. 1100
  37. 430
  38. 275
  39. 175
  40. 1800

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