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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 748 · 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. 1.79 × 50 =
  2. 2.91 × 5 =
  3. 3.48 × 5 =
  4. 4.68 × 5 =
  5. 5.85 × 5 =
  6. 6.83 × 5 =
  7. 7.77 × 50 =
  8. 8.53 × 5 =
  9. 9.49 × 50 =
  10. 10.81 × 5 =
  11. 11.14 × 5 =
  12. 12.21 × 50 =
  13. 13.27 × 5 =
  14. 14.20 × 50 =
  15. 15.38 × 50 =
  16. 16.98 × 50 =
  17. 17.50 × 50 =
  18. 18.42 × 50 =
  19. 19.74 × 50 =
  20. 20.65 × 5 =
  21. 21.88 × 50 =
  22. 22.27 × 5 =
  23. 23.22 × 5 =
  24. 24.69 × 50 =
  25. 25.16 × 5 =
  26. 26.16 × 5 =
  27. 27.14 × 50 =
  28. 28.70 × 50 =
  29. 29.29 × 50 =
  30. 30.98 × 50 =
  31. 31.90 × 50 =
  32. 32.45 × 50 =
  33. 33.58 × 50 =
  34. 34.65 × 50 =
  35. 35.21 × 50 =
  36. 36.79 × 5 =
  37. 37.91 × 50 =
  38. 38.32 × 5 =
  39. 39.41 × 50 =
  40. 40.21 × 50 =

Answer key

  1. 3950
  2. 455
  3. 240
  4. 340
  5. 425
  6. 415
  7. 3850
  8. 265
  9. 2450
  10. 405
  11. 70
  12. 1050
  13. 135
  14. 1000
  15. 1900
  16. 4900
  17. 2500
  18. 2100
  19. 3700
  20. 325
  21. 4400
  22. 135
  23. 110
  24. 3450
  25. 80
  26. 80
  27. 700
  28. 3500
  29. 1450
  30. 4900
  31. 4500
  32. 2250
  33. 2900
  34. 3250
  35. 1050
  36. 395
  37. 4550
  38. 160
  39. 2050
  40. 1050

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