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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 143 · 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. 1.31 × 50 =
  2. 2.33 × 5 =
  3. 3.77 × 5 =
  4. 4.63 × 50 =
  5. 5.13 × 5 =
  6. 6.41 × 5 =
  7. 7.80 × 5 =
  8. 8.30 × 5 =
  9. 9.92 × 50 =
  10. 10.21 × 5 =
  11. 11.16 × 5 =
  12. 12.31 × 50 =
  13. 13.41 × 5 =
  14. 14.67 × 5 =
  15. 15.81 × 5 =
  16. 16.15 × 5 =
  17. 17.50 × 5 =
  18. 18.16 × 50 =
  19. 19.19 × 50 =
  20. 20.83 × 5 =
  21. 21.44 × 50 =
  22. 22.15 × 50 =
  23. 23.47 × 50 =
  24. 24.69 × 50 =
  25. 25.67 × 5 =
  26. 26.76 × 50 =
  27. 27.17 × 50 =
  28. 28.43 × 5 =
  29. 29.27 × 50 =
  30. 30.61 × 50 =
  31. 31.90 × 5 =
  32. 32.67 × 5 =
  33. 33.66 × 5 =
  34. 34.94 × 50 =
  35. 35.24 × 5 =
  36. 36.79 × 5 =
  37. 37.80 × 5 =
  38. 38.91 × 5 =
  39. 39.88 × 5 =
  40. 40.25 × 50 =

Answer key

  1. 1550
  2. 165
  3. 385
  4. 3150
  5. 65
  6. 205
  7. 400
  8. 150
  9. 4600
  10. 105
  11. 80
  12. 1550
  13. 205
  14. 335
  15. 405
  16. 75
  17. 250
  18. 800
  19. 950
  20. 415
  21. 2200
  22. 750
  23. 2350
  24. 3450
  25. 335
  26. 3800
  27. 850
  28. 215
  29. 1350
  30. 3050
  31. 450
  32. 335
  33. 330
  34. 4700
  35. 120
  36. 395
  37. 400
  38. 455
  39. 440
  40. 1250

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