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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 237 · 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. 1.66 × 5 =
  2. 2.20 × 50 =
  3. 3.32 × 5 =
  4. 4.79 × 5 =
  5. 5.21 × 50 =
  6. 6.97 × 5 =
  7. 7.36 × 50 =
  8. 8.52 × 5 =
  9. 9.95 × 50 =
  10. 10.27 × 50 =
  11. 11.66 × 5 =
  12. 12.34 × 50 =
  13. 13.78 × 50 =
  14. 14.63 × 5 =
  15. 15.46 × 50 =
  16. 16.95 × 50 =
  17. 17.34 × 5 =
  18. 18.15 × 5 =
  19. 19.90 × 50 =
  20. 20.70 × 50 =
  21. 21.23 × 5 =
  22. 22.90 × 5 =
  23. 23.15 × 5 =
  24. 24.94 × 50 =
  25. 25.37 × 50 =
  26. 26.65 × 50 =
  27. 27.49 × 50 =
  28. 28.59 × 5 =
  29. 29.51 × 5 =
  30. 30.83 × 50 =
  31. 31.48 × 50 =
  32. 32.75 × 5 =
  33. 33.48 × 5 =
  34. 34.57 × 5 =
  35. 35.59 × 50 =
  36. 36.36 × 5 =
  37. 37.17 × 5 =
  38. 38.71 × 5 =
  39. 39.80 × 5 =
  40. 40.25 × 5 =

Answer key

  1. 330
  2. 1000
  3. 160
  4. 395
  5. 1050
  6. 485
  7. 1800
  8. 260
  9. 4750
  10. 1350
  11. 330
  12. 1700
  13. 3900
  14. 315
  15. 2300
  16. 4750
  17. 170
  18. 75
  19. 4500
  20. 3500
  21. 115
  22. 450
  23. 75
  24. 4700
  25. 1850
  26. 3250
  27. 2450
  28. 295
  29. 255
  30. 4150
  31. 2400
  32. 375
  33. 240
  34. 285
  35. 2950
  36. 180
  37. 85
  38. 355
  39. 400
  40. 125

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