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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 655 · 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. 1.91 × 50 =
  2. 2.48 × 50 =
  3. 3.78 × 5 =
  4. 4.29 × 50 =
  5. 5.40 × 5 =
  6. 6.58 × 50 =
  7. 7.83 × 50 =
  8. 8.17 × 5 =
  9. 9.84 × 50 =
  10. 10.79 × 50 =
  11. 11.78 × 50 =
  12. 12.35 × 50 =
  13. 13.47 × 5 =
  14. 14.18 × 5 =
  15. 15.85 × 50 =
  16. 16.44 × 5 =
  17. 17.26 × 5 =
  18. 18.41 × 5 =
  19. 19.67 × 5 =
  20. 20.27 × 50 =
  21. 21.66 × 5 =
  22. 22.34 × 50 =
  23. 23.55 × 50 =
  24. 24.37 × 50 =
  25. 25.22 × 50 =
  26. 26.54 × 5 =
  27. 27.21 × 5 =
  28. 28.26 × 5 =
  29. 29.49 × 5 =
  30. 30.77 × 5 =
  31. 31.90 × 5 =
  32. 32.89 × 50 =
  33. 33.36 × 5 =
  34. 34.56 × 50 =
  35. 35.19 × 50 =
  36. 36.17 × 50 =
  37. 37.14 × 5 =
  38. 38.76 × 5 =
  39. 39.61 × 5 =
  40. 40.31 × 50 =

Answer key

  1. 4550
  2. 2400
  3. 390
  4. 1450
  5. 200
  6. 2900
  7. 4150
  8. 85
  9. 4200
  10. 3950
  11. 3900
  12. 1750
  13. 235
  14. 90
  15. 4250
  16. 220
  17. 130
  18. 205
  19. 335
  20. 1350
  21. 330
  22. 1700
  23. 2750
  24. 1850
  25. 1100
  26. 270
  27. 105
  28. 130
  29. 245
  30. 385
  31. 450
  32. 4450
  33. 180
  34. 2800
  35. 950
  36. 850
  37. 70
  38. 380
  39. 305
  40. 1550

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