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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 384 · 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. 1.16 × 5 =
  2. 2.33 × 50 =
  3. 3.18 × 50 =
  4. 4.95 × 50 =
  5. 5.15 × 5 =
  6. 6.18 × 50 =
  7. 7.28 × 50 =
  8. 8.98 × 5 =
  9. 9.38 × 50 =
  10. 10.24 × 5 =
  11. 11.48 × 5 =
  12. 12.15 × 50 =
  13. 13.92 × 5 =
  14. 14.75 × 50 =
  15. 15.59 × 5 =
  16. 16.41 × 5 =
  17. 17.90 × 50 =
  18. 18.40 × 50 =
  19. 19.31 × 5 =
  20. 20.33 × 50 =
  21. 21.89 × 50 =
  22. 22.15 × 50 =
  23. 23.87 × 5 =
  24. 24.94 × 5 =
  25. 25.52 × 5 =
  26. 26.65 × 5 =
  27. 27.31 × 5 =
  28. 28.31 × 5 =
  29. 29.58 × 50 =
  30. 30.39 × 5 =
  31. 31.71 × 5 =
  32. 32.77 × 50 =
  33. 33.18 × 50 =
  34. 34.58 × 50 =
  35. 35.49 × 5 =
  36. 36.38 × 5 =
  37. 37.75 × 50 =
  38. 38.18 × 5 =
  39. 39.77 × 5 =
  40. 40.69 × 5 =

Answer key

  1. 80
  2. 1650
  3. 900
  4. 4750
  5. 75
  6. 900
  7. 1400
  8. 490
  9. 1900
  10. 120
  11. 240
  12. 750
  13. 460
  14. 3750
  15. 295
  16. 205
  17. 4500
  18. 2000
  19. 155
  20. 1650
  21. 4450
  22. 750
  23. 435
  24. 470
  25. 260
  26. 325
  27. 155
  28. 155
  29. 2900
  30. 195
  31. 355
  32. 3850
  33. 900
  34. 2900
  35. 245
  36. 190
  37. 3750
  38. 90
  39. 385
  40. 345

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