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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 637 · 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. 1.73 × 5 =
  2. 2.77 × 5 =
  3. 3.18 × 5 =
  4. 4.47 × 5 =
  5. 5.83 × 50 =
  6. 6.41 × 5 =
  7. 7.69 × 5 =
  8. 8.56 × 5 =
  9. 9.29 × 5 =
  10. 10.55 × 5 =
  11. 11.78 × 5 =
  12. 12.39 × 50 =
  13. 13.21 × 5 =
  14. 14.26 × 5 =
  15. 15.86 × 5 =
  16. 16.38 × 5 =
  17. 17.57 × 5 =
  18. 18.89 × 50 =
  19. 19.48 × 50 =
  20. 20.70 × 5 =
  21. 21.72 × 5 =
  22. 22.72 × 5 =
  23. 23.91 × 5 =
  24. 24.35 × 50 =
  25. 25.56 × 5 =
  26. 26.76 × 5 =
  27. 27.56 × 50 =
  28. 28.48 × 50 =
  29. 29.44 × 5 =
  30. 30.84 × 5 =
  31. 31.79 × 50 =
  32. 32.75 × 5 =
  33. 33.17 × 50 =
  34. 34.40 × 5 =
  35. 35.18 × 50 =
  36. 36.31 × 50 =
  37. 37.19 × 50 =
  38. 38.88 × 50 =
  39. 39.91 × 50 =
  40. 40.42 × 50 =

Answer key

  1. 365
  2. 385
  3. 90
  4. 235
  5. 4150
  6. 205
  7. 345
  8. 280
  9. 145
  10. 275
  11. 390
  12. 1950
  13. 105
  14. 130
  15. 430
  16. 190
  17. 285
  18. 4450
  19. 2400
  20. 350
  21. 360
  22. 360
  23. 455
  24. 1750
  25. 280
  26. 380
  27. 2800
  28. 2400
  29. 220
  30. 420
  31. 3950
  32. 375
  33. 850
  34. 200
  35. 900
  36. 1550
  37. 950
  38. 4400
  39. 4550
  40. 2100

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