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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 525 · 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. 1.14 × 5 =
  2. 2.71 × 5 =
  3. 3.97 × 50 =
  4. 4.53 × 5 =
  5. 5.68 × 50 =
  6. 6.92 × 50 =
  7. 7.18 × 5 =
  8. 8.34 × 50 =
  9. 9.12 × 5 =
  10. 10.81 × 5 =
  11. 11.61 × 5 =
  12. 12.28 × 5 =
  13. 13.30 × 50 =
  14. 14.80 × 50 =
  15. 15.71 × 50 =
  16. 16.45 × 50 =
  17. 17.54 × 50 =
  18. 18.15 × 50 =
  19. 19.61 × 50 =
  20. 20.31 × 5 =
  21. 21.38 × 5 =
  22. 22.45 × 5 =
  23. 23.13 × 5 =
  24. 24.62 × 5 =
  25. 25.47 × 5 =
  26. 26.62 × 5 =
  27. 27.25 × 50 =
  28. 28.76 × 5 =
  29. 29.48 × 50 =
  30. 30.73 × 5 =
  31. 31.74 × 50 =
  32. 32.26 × 50 =
  33. 33.34 × 5 =
  34. 34.45 × 5 =
  35. 35.34 × 5 =
  36. 36.60 × 50 =
  37. 37.34 × 5 =
  38. 38.18 × 50 =
  39. 39.19 × 50 =
  40. 40.49 × 5 =

Answer key

  1. 70
  2. 355
  3. 4850
  4. 265
  5. 3400
  6. 4600
  7. 90
  8. 1700
  9. 60
  10. 405
  11. 305
  12. 140
  13. 1500
  14. 4000
  15. 3550
  16. 2250
  17. 2700
  18. 750
  19. 3050
  20. 155
  21. 190
  22. 225
  23. 65
  24. 310
  25. 235
  26. 310
  27. 1250
  28. 380
  29. 2400
  30. 365
  31. 3700
  32. 1300
  33. 170
  34. 225
  35. 170
  36. 3000
  37. 170
  38. 900
  39. 950
  40. 245

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