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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 623 · 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. 1.25 × 50 =
  2. 2.71 × 5 =
  3. 3.31 × 5 =
  4. 4.36 × 5 =
  5. 5.41 × 5 =
  6. 6.97 × 5 =
  7. 7.81 × 50 =
  8. 8.89 × 50 =
  9. 9.59 × 5 =
  10. 10.75 × 5 =
  11. 11.67 × 5 =
  12. 12.12 × 5 =
  13. 13.21 × 5 =
  14. 14.63 × 50 =
  15. 15.79 × 5 =
  16. 16.35 × 5 =
  17. 17.81 × 5 =
  18. 18.58 × 50 =
  19. 19.16 × 5 =
  20. 20.68 × 50 =
  21. 21.40 × 5 =
  22. 22.44 × 5 =
  23. 23.81 × 50 =
  24. 24.19 × 50 =
  25. 25.62 × 50 =
  26. 26.19 × 5 =
  27. 27.53 × 5 =
  28. 28.25 × 5 =
  29. 29.84 × 5 =
  30. 30.40 × 5 =
  31. 31.51 × 50 =
  32. 32.16 × 5 =
  33. 33.42 × 50 =
  34. 34.27 × 5 =
  35. 35.63 × 5 =
  36. 36.26 × 50 =
  37. 37.18 × 50 =
  38. 38.97 × 5 =
  39. 39.14 × 5 =
  40. 40.78 × 5 =

Answer key

  1. 1250
  2. 355
  3. 155
  4. 180
  5. 205
  6. 485
  7. 4050
  8. 4450
  9. 295
  10. 375
  11. 335
  12. 60
  13. 105
  14. 3150
  15. 395
  16. 175
  17. 405
  18. 2900
  19. 80
  20. 3400
  21. 200
  22. 220
  23. 4050
  24. 950
  25. 3100
  26. 95
  27. 265
  28. 125
  29. 420
  30. 200
  31. 2550
  32. 80
  33. 2100
  34. 135
  35. 315
  36. 1300
  37. 900
  38. 485
  39. 70
  40. 390

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