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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 392 · 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. 1.61 × 5 =
  2. 2.93 × 50 =
  3. 3.78 × 5 =
  4. 4.28 × 5 =
  5. 5.94 × 5 =
  6. 6.16 × 5 =
  7. 7.73 × 5 =
  8. 8.53 × 5 =
  9. 9.33 × 50 =
  10. 10.32 × 50 =
  11. 11.92 × 50 =
  12. 12.40 × 5 =
  13. 13.66 × 50 =
  14. 14.18 × 5 =
  15. 15.94 × 50 =
  16. 16.76 × 5 =
  17. 17.20 × 5 =
  18. 18.81 × 50 =
  19. 19.58 × 50 =
  20. 20.49 × 50 =
  21. 21.81 × 5 =
  22. 22.89 × 50 =
  23. 23.70 × 5 =
  24. 24.22 × 5 =
  25. 25.95 × 5 =
  26. 26.78 × 50 =
  27. 27.48 × 5 =
  28. 28.24 × 50 =
  29. 29.59 × 50 =
  30. 30.19 × 5 =
  31. 31.62 × 5 =
  32. 32.37 × 5 =
  33. 33.17 × 50 =
  34. 34.17 × 5 =
  35. 35.48 × 50 =
  36. 36.96 × 5 =
  37. 37.18 × 50 =
  38. 38.42 × 50 =
  39. 39.43 × 50 =
  40. 40.37 × 5 =

Answer key

  1. 305
  2. 4650
  3. 390
  4. 140
  5. 470
  6. 80
  7. 365
  8. 265
  9. 1650
  10. 1600
  11. 4600
  12. 200
  13. 3300
  14. 90
  15. 4700
  16. 380
  17. 100
  18. 4050
  19. 2900
  20. 2450
  21. 405
  22. 4450
  23. 350
  24. 110
  25. 475
  26. 3900
  27. 240
  28. 1200
  29. 2950
  30. 95
  31. 310
  32. 185
  33. 850
  34. 85
  35. 2400
  36. 480
  37. 900
  38. 2100
  39. 2150
  40. 185

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