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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 391 · 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. 1.61 × 5 =
  2. 2.67 × 5 =
  3. 3.25 × 50 =
  4. 4.61 × 5 =
  5. 5.75 × 50 =
  6. 6.52 × 50 =
  7. 7.19 × 5 =
  8. 8.24 × 50 =
  9. 9.20 × 50 =
  10. 10.17 × 5 =
  11. 11.18 × 50 =
  12. 12.19 × 50 =
  13. 13.13 × 5 =
  14. 14.23 × 5 =
  15. 15.32 × 50 =
  16. 16.79 × 50 =
  17. 17.43 × 50 =
  18. 18.71 × 5 =
  19. 19.98 × 50 =
  20. 20.64 × 50 =
  21. 21.37 × 5 =
  22. 22.60 × 5 =
  23. 23.43 × 5 =
  24. 24.23 × 50 =
  25. 25.60 × 50 =
  26. 26.88 × 5 =
  27. 27.66 × 5 =
  28. 28.19 × 5 =
  29. 29.33 × 5 =
  30. 30.64 × 5 =
  31. 31.90 × 5 =
  32. 32.38 × 5 =
  33. 33.26 × 50 =
  34. 34.49 × 50 =
  35. 35.55 × 50 =
  36. 36.44 × 5 =
  37. 37.21 × 5 =
  38. 38.77 × 50 =
  39. 39.76 × 50 =
  40. 40.20 × 50 =

Answer key

  1. 305
  2. 335
  3. 1250
  4. 305
  5. 3750
  6. 2600
  7. 95
  8. 1200
  9. 1000
  10. 85
  11. 900
  12. 950
  13. 65
  14. 115
  15. 1600
  16. 3950
  17. 2150
  18. 355
  19. 4900
  20. 3200
  21. 185
  22. 300
  23. 215
  24. 1150
  25. 3000
  26. 440
  27. 330
  28. 95
  29. 165
  30. 320
  31. 450
  32. 190
  33. 1300
  34. 2450
  35. 2750
  36. 220
  37. 105
  38. 3850
  39. 3800
  40. 1000

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