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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 652 · 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. 1.84 × 5 =
  2. 2.17 × 5 =
  3. 3.81 × 5 =
  4. 4.18 × 5 =
  5. 5.70 × 5 =
  6. 6.22 × 5 =
  7. 7.40 × 5 =
  8. 8.61 × 50 =
  9. 9.46 × 50 =
  10. 10.95 × 5 =
  11. 11.54 × 50 =
  12. 12.95 × 50 =
  13. 13.14 × 50 =
  14. 14.25 × 5 =
  15. 15.25 × 50 =
  16. 16.70 × 50 =
  17. 17.33 × 50 =
  18. 18.47 × 5 =
  19. 19.24 × 50 =
  20. 20.40 × 5 =
  21. 21.41 × 50 =
  22. 22.65 × 5 =
  23. 23.96 × 50 =
  24. 24.85 × 5 =
  25. 25.18 × 5 =
  26. 26.97 × 50 =
  27. 27.67 × 5 =
  28. 28.65 × 5 =
  29. 29.50 × 5 =
  30. 30.32 × 5 =
  31. 31.30 × 5 =
  32. 32.78 × 50 =
  33. 33.64 × 5 =
  34. 34.86 × 5 =
  35. 35.14 × 50 =
  36. 36.38 × 50 =
  37. 37.94 × 5 =
  38. 38.23 × 50 =
  39. 39.69 × 5 =
  40. 40.41 × 5 =

Answer key

  1. 420
  2. 85
  3. 405
  4. 90
  5. 350
  6. 110
  7. 200
  8. 3050
  9. 2300
  10. 475
  11. 2700
  12. 4750
  13. 700
  14. 125
  15. 1250
  16. 3500
  17. 1650
  18. 235
  19. 1200
  20. 200
  21. 2050
  22. 325
  23. 4800
  24. 425
  25. 90
  26. 4850
  27. 335
  28. 325
  29. 250
  30. 160
  31. 150
  32. 3900
  33. 320
  34. 430
  35. 700
  36. 1900
  37. 470
  38. 1150
  39. 345
  40. 205

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