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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 267 · 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. 1.75 × 5 =
  2. 2.47 × 50 =
  3. 3.82 × 50 =
  4. 4.42 × 50 =
  5. 5.77 × 50 =
  6. 6.34 × 5 =
  7. 7.28 × 50 =
  8. 8.29 × 50 =
  9. 9.85 × 50 =
  10. 10.28 × 50 =
  11. 11.39 × 5 =
  12. 12.70 × 5 =
  13. 13.32 × 50 =
  14. 14.40 × 50 =
  15. 15.84 × 50 =
  16. 16.12 × 5 =
  17. 17.70 × 5 =
  18. 18.28 × 5 =
  19. 19.53 × 5 =
  20. 20.56 × 5 =
  21. 21.66 × 5 =
  22. 22.13 × 50 =
  23. 23.81 × 50 =
  24. 24.76 × 5 =
  25. 25.63 × 50 =
  26. 26.47 × 50 =
  27. 27.42 × 5 =
  28. 28.23 × 5 =
  29. 29.35 × 50 =
  30. 30.18 × 5 =
  31. 31.67 × 50 =
  32. 32.58 × 50 =
  33. 33.33 × 5 =
  34. 34.14 × 5 =
  35. 35.98 × 5 =
  36. 36.57 × 5 =
  37. 37.86 × 5 =
  38. 38.24 × 50 =
  39. 39.58 × 50 =
  40. 40.32 × 5 =

Answer key

  1. 375
  2. 2350
  3. 4100
  4. 2100
  5. 3850
  6. 170
  7. 1400
  8. 1450
  9. 4250
  10. 1400
  11. 195
  12. 350
  13. 1600
  14. 2000
  15. 4200
  16. 60
  17. 350
  18. 140
  19. 265
  20. 280
  21. 330
  22. 650
  23. 4050
  24. 380
  25. 3150
  26. 2350
  27. 210
  28. 115
  29. 1750
  30. 90
  31. 3350
  32. 2900
  33. 165
  34. 70
  35. 490
  36. 285
  37. 430
  38. 1200
  39. 2900
  40. 160

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