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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 682 · 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. 1.34 × 50 =
  2. 2.71 × 5 =
  3. 3.76 × 50 =
  4. 4.48 × 50 =
  5. 5.42 × 50 =
  6. 6.24 × 50 =
  7. 7.47 × 50 =
  8. 8.36 × 5 =
  9. 9.37 × 5 =
  10. 10.69 × 50 =
  11. 11.52 × 5 =
  12. 12.23 × 5 =
  13. 13.75 × 50 =
  14. 14.79 × 50 =
  15. 15.22 × 5 =
  16. 16.84 × 50 =
  17. 17.43 × 50 =
  18. 18.90 × 5 =
  19. 19.14 × 50 =
  20. 20.93 × 5 =
  21. 21.18 × 5 =
  22. 22.50 × 5 =
  23. 23.13 × 50 =
  24. 24.21 × 5 =
  25. 25.19 × 5 =
  26. 26.35 × 50 =
  27. 27.29 × 5 =
  28. 28.95 × 50 =
  29. 29.78 × 5 =
  30. 30.58 × 5 =
  31. 31.85 × 5 =
  32. 32.47 × 50 =
  33. 33.66 × 5 =
  34. 34.46 × 5 =
  35. 35.75 × 5 =
  36. 36.13 × 5 =
  37. 37.22 × 5 =
  38. 38.69 × 50 =
  39. 39.28 × 5 =
  40. 40.60 × 5 =

Answer key

  1. 1700
  2. 355
  3. 3800
  4. 2400
  5. 2100
  6. 1200
  7. 2350
  8. 180
  9. 185
  10. 3450
  11. 260
  12. 115
  13. 3750
  14. 3950
  15. 110
  16. 4200
  17. 2150
  18. 450
  19. 700
  20. 465
  21. 90
  22. 250
  23. 650
  24. 105
  25. 95
  26. 1750
  27. 145
  28. 4750
  29. 390
  30. 290
  31. 425
  32. 2350
  33. 330
  34. 230
  35. 375
  36. 65
  37. 110
  38. 3450
  39. 140
  40. 300

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