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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 447 · 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. 1.20 × 5 =
  2. 2.70 × 5 =
  3. 3.30 × 5 =
  4. 4.63 × 5 =
  5. 5.70 × 50 =
  6. 6.66 × 5 =
  7. 7.82 × 5 =
  8. 8.70 × 50 =
  9. 9.41 × 5 =
  10. 10.81 × 5 =
  11. 11.55 × 50 =
  12. 12.38 × 5 =
  13. 13.93 × 5 =
  14. 14.25 × 5 =
  15. 15.26 × 5 =
  16. 16.32 × 5 =
  17. 17.62 × 5 =
  18. 18.60 × 5 =
  19. 19.28 × 5 =
  20. 20.12 × 5 =
  21. 21.97 × 50 =
  22. 22.32 × 5 =
  23. 23.23 × 5 =
  24. 24.63 × 5 =
  25. 25.63 × 5 =
  26. 26.92 × 5 =
  27. 27.60 × 50 =
  28. 28.19 × 50 =
  29. 29.14 × 50 =
  30. 30.39 × 5 =
  31. 31.76 × 50 =
  32. 32.30 × 5 =
  33. 33.12 × 5 =
  34. 34.47 × 50 =
  35. 35.92 × 5 =
  36. 36.25 × 5 =
  37. 37.93 × 50 =
  38. 38.34 × 5 =
  39. 39.18 × 5 =
  40. 40.52 × 50 =

Answer key

  1. 100
  2. 350
  3. 150
  4. 315
  5. 3500
  6. 330
  7. 410
  8. 3500
  9. 205
  10. 405
  11. 2750
  12. 190
  13. 465
  14. 125
  15. 130
  16. 160
  17. 310
  18. 300
  19. 140
  20. 60
  21. 4850
  22. 160
  23. 115
  24. 315
  25. 315
  26. 460
  27. 3000
  28. 950
  29. 700
  30. 195
  31. 3800
  32. 150
  33. 60
  34. 2350
  35. 460
  36. 125
  37. 4650
  38. 170
  39. 90
  40. 2600

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