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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 11 · 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. 1.65 × 50 =
  2. 2.27 × 5 =
  3. 3.58 × 50 =
  4. 4.14 × 5 =
  5. 5.73 × 50 =
  6. 6.75 × 5 =
  7. 7.45 × 5 =
  8. 8.33 × 5 =
  9. 9.68 × 50 =
  10. 10.47 × 50 =
  11. 11.33 × 5 =
  12. 12.21 × 50 =
  13. 13.95 × 50 =
  14. 14.24 × 5 =
  15. 15.61 × 50 =
  16. 16.61 × 50 =
  17. 17.50 × 5 =
  18. 18.93 × 50 =
  19. 19.60 × 50 =
  20. 20.96 × 50 =
  21. 21.35 × 5 =
  22. 22.21 × 5 =
  23. 23.37 × 50 =
  24. 24.12 × 5 =
  25. 25.43 × 50 =
  26. 26.58 × 5 =
  27. 27.28 × 50 =
  28. 28.85 × 5 =
  29. 29.96 × 5 =
  30. 30.44 × 5 =
  31. 31.36 × 50 =
  32. 32.59 × 50 =
  33. 33.31 × 50 =
  34. 34.79 × 50 =
  35. 35.98 × 5 =
  36. 36.84 × 5 =
  37. 37.90 × 50 =
  38. 38.89 × 50 =
  39. 39.79 × 5 =
  40. 40.79 × 50 =

Answer key

  1. 3250
  2. 135
  3. 2900
  4. 70
  5. 3650
  6. 375
  7. 225
  8. 165
  9. 3400
  10. 2350
  11. 165
  12. 1050
  13. 4750
  14. 120
  15. 3050
  16. 3050
  17. 250
  18. 4650
  19. 3000
  20. 4800
  21. 175
  22. 105
  23. 1850
  24. 60
  25. 2150
  26. 290
  27. 1400
  28. 425
  29. 480
  30. 220
  31. 1800
  32. 2950
  33. 1550
  34. 3950
  35. 490
  36. 420
  37. 4500
  38. 4450
  39. 395
  40. 3950

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