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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 393 · 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. 1.17 × 5 =
  2. 2.39 × 5 =
  3. 3.13 × 50 =
  4. 4.52 × 5 =
  5. 5.44 × 50 =
  6. 6.35 × 50 =
  7. 7.45 × 5 =
  8. 8.36 × 5 =
  9. 9.62 × 50 =
  10. 10.73 × 5 =
  11. 11.37 × 50 =
  12. 12.65 × 50 =
  13. 13.81 × 50 =
  14. 14.37 × 5 =
  15. 15.55 × 5 =
  16. 16.54 × 5 =
  17. 17.90 × 5 =
  18. 18.15 × 5 =
  19. 19.61 × 50 =
  20. 20.85 × 50 =
  21. 21.69 × 5 =
  22. 22.38 × 50 =
  23. 23.93 × 50 =
  24. 24.28 × 50 =
  25. 25.58 × 50 =
  26. 26.13 × 5 =
  27. 27.77 × 5 =
  28. 28.66 × 5 =
  29. 29.13 × 5 =
  30. 30.89 × 5 =
  31. 31.35 × 5 =
  32. 32.41 × 5 =
  33. 33.25 × 50 =
  34. 34.84 × 5 =
  35. 35.62 × 50 =
  36. 36.38 × 50 =
  37. 37.55 × 5 =
  38. 38.57 × 5 =
  39. 39.47 × 50 =
  40. 40.29 × 50 =

Answer key

  1. 85
  2. 195
  3. 650
  4. 260
  5. 2200
  6. 1750
  7. 225
  8. 180
  9. 3100
  10. 365
  11. 1850
  12. 3250
  13. 4050
  14. 185
  15. 275
  16. 270
  17. 450
  18. 75
  19. 3050
  20. 4250
  21. 345
  22. 1900
  23. 4650
  24. 1400
  25. 2900
  26. 65
  27. 385
  28. 330
  29. 65
  30. 445
  31. 175
  32. 205
  33. 1250
  34. 420
  35. 3100
  36. 1900
  37. 275
  38. 285
  39. 2350
  40. 1450

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