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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 214 · 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. 1.87 × 5 =
  2. 2.73 × 50 =
  3. 3.39 × 50 =
  4. 4.56 × 5 =
  5. 5.25 × 5 =
  6. 6.13 × 5 =
  7. 7.59 × 50 =
  8. 8.49 × 50 =
  9. 9.21 × 50 =
  10. 10.85 × 5 =
  11. 11.95 × 5 =
  12. 12.53 × 50 =
  13. 13.15 × 5 =
  14. 14.34 × 5 =
  15. 15.17 × 50 =
  16. 16.18 × 50 =
  17. 17.22 × 50 =
  18. 18.28 × 5 =
  19. 19.84 × 50 =
  20. 20.18 × 5 =
  21. 21.80 × 50 =
  22. 22.67 × 50 =
  23. 23.41 × 50 =
  24. 24.62 × 5 =
  25. 25.35 × 50 =
  26. 26.93 × 5 =
  27. 27.29 × 50 =
  28. 28.60 × 5 =
  29. 29.43 × 50 =
  30. 30.82 × 50 =
  31. 31.66 × 5 =
  32. 32.13 × 5 =
  33. 33.93 × 5 =
  34. 34.86 × 5 =
  35. 35.21 × 50 =
  36. 36.44 × 50 =
  37. 37.33 × 5 =
  38. 38.89 × 50 =
  39. 39.12 × 50 =
  40. 40.35 × 5 =

Answer key

  1. 435
  2. 3650
  3. 1950
  4. 280
  5. 125
  6. 65
  7. 2950
  8. 2450
  9. 1050
  10. 425
  11. 475
  12. 2650
  13. 75
  14. 170
  15. 850
  16. 900
  17. 1100
  18. 140
  19. 4200
  20. 90
  21. 4000
  22. 3350
  23. 2050
  24. 310
  25. 1750
  26. 465
  27. 1450
  28. 300
  29. 2150
  30. 4100
  31. 330
  32. 65
  33. 465
  34. 430
  35. 1050
  36. 2200
  37. 165
  38. 4450
  39. 600
  40. 175

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