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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 402 · 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. 1.64 × 50 =
  2. 2.30 × 5 =
  3. 3.84 × 50 =
  4. 4.27 × 50 =
  5. 5.97 × 50 =
  6. 6.55 × 50 =
  7. 7.15 × 5 =
  8. 8.79 × 5 =
  9. 9.77 × 5 =
  10. 10.29 × 50 =
  11. 11.12 × 5 =
  12. 12.78 × 50 =
  13. 13.18 × 5 =
  14. 14.34 × 5 =
  15. 15.64 × 5 =
  16. 16.41 × 50 =
  17. 17.49 × 5 =
  18. 18.72 × 50 =
  19. 19.28 × 5 =
  20. 20.61 × 5 =
  21. 21.41 × 5 =
  22. 22.67 × 5 =
  23. 23.26 × 50 =
  24. 24.58 × 50 =
  25. 25.40 × 50 =
  26. 26.48 × 5 =
  27. 27.81 × 50 =
  28. 28.30 × 50 =
  29. 29.68 × 5 =
  30. 30.17 × 50 =
  31. 31.47 × 50 =
  32. 32.64 × 50 =
  33. 33.16 × 5 =
  34. 34.85 × 50 =
  35. 35.39 × 5 =
  36. 36.33 × 5 =
  37. 37.57 × 5 =
  38. 38.80 × 5 =
  39. 39.42 × 50 =
  40. 40.56 × 50 =

Answer key

  1. 3200
  2. 150
  3. 4200
  4. 1350
  5. 4850
  6. 2750
  7. 75
  8. 395
  9. 385
  10. 1450
  11. 60
  12. 3900
  13. 90
  14. 170
  15. 320
  16. 2050
  17. 245
  18. 3600
  19. 140
  20. 305
  21. 205
  22. 335
  23. 1300
  24. 2900
  25. 2000
  26. 240
  27. 4050
  28. 1500
  29. 340
  30. 850
  31. 2350
  32. 3200
  33. 80
  34. 4250
  35. 195
  36. 165
  37. 285
  38. 400
  39. 2100
  40. 2800

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