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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 746 · 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. 1.35 × 5 =
  2. 2.45 × 5 =
  3. 3.20 × 5 =
  4. 4.88 × 5 =
  5. 5.78 × 50 =
  6. 6.39 × 5 =
  7. 7.17 × 5 =
  8. 8.71 × 5 =
  9. 9.89 × 5 =
  10. 10.98 × 50 =
  11. 11.31 × 5 =
  12. 12.60 × 5 =
  13. 13.56 × 5 =
  14. 14.98 × 5 =
  15. 15.28 × 5 =
  16. 16.33 × 5 =
  17. 17.84 × 5 =
  18. 18.64 × 5 =
  19. 19.26 × 5 =
  20. 20.93 × 5 =
  21. 21.56 × 50 =
  22. 22.93 × 5 =
  23. 23.28 × 50 =
  24. 24.31 × 50 =
  25. 25.72 × 50 =
  26. 26.74 × 5 =
  27. 27.71 × 5 =
  28. 28.26 × 5 =
  29. 29.21 × 50 =
  30. 30.12 × 50 =
  31. 31.19 × 5 =
  32. 32.15 × 5 =
  33. 33.69 × 50 =
  34. 34.67 × 50 =
  35. 35.72 × 50 =
  36. 36.69 × 5 =
  37. 37.19 × 50 =
  38. 38.19 × 50 =
  39. 39.65 × 50 =
  40. 40.12 × 50 =

Answer key

  1. 175
  2. 225
  3. 100
  4. 440
  5. 3900
  6. 195
  7. 85
  8. 355
  9. 445
  10. 4900
  11. 155
  12. 300
  13. 280
  14. 490
  15. 140
  16. 165
  17. 420
  18. 320
  19. 130
  20. 465
  21. 2800
  22. 465
  23. 1400
  24. 1550
  25. 3600
  26. 370
  27. 355
  28. 130
  29. 1050
  30. 600
  31. 95
  32. 75
  33. 3450
  34. 3350
  35. 3600
  36. 345
  37. 950
  38. 950
  39. 3250
  40. 600

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