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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 765 · 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. 1.65 × 5 =
  2. 2.61 × 50 =
  3. 3.97 × 5 =
  4. 4.56 × 5 =
  5. 5.90 × 50 =
  6. 6.80 × 50 =
  7. 7.76 × 50 =
  8. 8.42 × 50 =
  9. 9.21 × 50 =
  10. 10.80 × 5 =
  11. 11.46 × 50 =
  12. 12.22 × 5 =
  13. 13.76 × 5 =
  14. 14.57 × 5 =
  15. 15.23 × 50 =
  16. 16.31 × 5 =
  17. 17.26 × 50 =
  18. 18.98 × 50 =
  19. 19.24 × 50 =
  20. 20.63 × 5 =
  21. 21.82 × 5 =
  22. 22.86 × 5 =
  23. 23.75 × 50 =
  24. 24.31 × 50 =
  25. 25.21 × 50 =
  26. 26.71 × 50 =
  27. 27.62 × 5 =
  28. 28.56 × 5 =
  29. 29.47 × 50 =
  30. 30.85 × 5 =
  31. 31.31 × 50 =
  32. 32.27 × 50 =
  33. 33.32 × 50 =
  34. 34.19 × 5 =
  35. 35.20 × 50 =
  36. 36.42 × 50 =
  37. 37.71 × 5 =
  38. 38.89 × 5 =
  39. 39.85 × 5 =
  40. 40.34 × 5 =

Answer key

  1. 325
  2. 3050
  3. 485
  4. 280
  5. 4500
  6. 4000
  7. 3800
  8. 2100
  9. 1050
  10. 400
  11. 2300
  12. 110
  13. 380
  14. 285
  15. 1150
  16. 155
  17. 1300
  18. 4900
  19. 1200
  20. 315
  21. 410
  22. 430
  23. 3750
  24. 1550
  25. 1050
  26. 3550
  27. 310
  28. 280
  29. 2350
  30. 425
  31. 1550
  32. 1350
  33. 1600
  34. 95
  35. 1000
  36. 2100
  37. 355
  38. 445
  39. 425
  40. 170

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