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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 191 · 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. 1.14 × 50 =
  2. 2.42 × 5 =
  3. 3.97 × 50 =
  4. 4.46 × 50 =
  5. 5.69 × 5 =
  6. 6.93 × 5 =
  7. 7.96 × 50 =
  8. 8.29 × 5 =
  9. 9.22 × 50 =
  10. 10.63 × 5 =
  11. 11.68 × 5 =
  12. 12.89 × 50 =
  13. 13.41 × 50 =
  14. 14.94 × 5 =
  15. 15.25 × 5 =
  16. 16.52 × 50 =
  17. 17.75 × 50 =
  18. 18.30 × 50 =
  19. 19.77 × 50 =
  20. 20.84 × 5 =
  21. 21.89 × 5 =
  22. 22.88 × 50 =
  23. 23.15 × 5 =
  24. 24.84 × 50 =
  25. 25.22 × 5 =
  26. 26.49 × 5 =
  27. 27.14 × 5 =
  28. 28.87 × 5 =
  29. 29.65 × 5 =
  30. 30.92 × 5 =
  31. 31.19 × 5 =
  32. 32.25 × 5 =
  33. 33.38 × 5 =
  34. 34.41 × 5 =
  35. 35.18 × 5 =
  36. 36.36 × 50 =
  37. 37.73 × 50 =
  38. 38.82 × 5 =
  39. 39.95 × 50 =
  40. 40.80 × 50 =

Answer key

  1. 700
  2. 210
  3. 4850
  4. 2300
  5. 345
  6. 465
  7. 4800
  8. 145
  9. 1100
  10. 315
  11. 340
  12. 4450
  13. 2050
  14. 470
  15. 125
  16. 2600
  17. 3750
  18. 1500
  19. 3850
  20. 420
  21. 445
  22. 4400
  23. 75
  24. 4200
  25. 110
  26. 245
  27. 70
  28. 435
  29. 325
  30. 460
  31. 95
  32. 125
  33. 190
  34. 205
  35. 90
  36. 1800
  37. 3650
  38. 410
  39. 4750
  40. 4000

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