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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 326 · 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. 1.50 × 50 =
  2. 2.80 × 5 =
  3. 3.15 × 50 =
  4. 4.45 × 5 =
  5. 5.56 × 5 =
  6. 6.61 × 50 =
  7. 7.80 × 50 =
  8. 8.26 × 50 =
  9. 9.84 × 50 =
  10. 10.19 × 50 =
  11. 11.65 × 50 =
  12. 12.88 × 5 =
  13. 13.34 × 5 =
  14. 14.96 × 5 =
  15. 15.17 × 50 =
  16. 16.12 × 5 =
  17. 17.82 × 50 =
  18. 18.37 × 5 =
  19. 19.32 × 5 =
  20. 20.16 × 50 =
  21. 21.54 × 5 =
  22. 22.97 × 50 =
  23. 23.63 × 5 =
  24. 24.97 × 5 =
  25. 25.39 × 5 =
  26. 26.12 × 5 =
  27. 27.15 × 50 =
  28. 28.87 × 5 =
  29. 29.32 × 5 =
  30. 30.18 × 50 =
  31. 31.85 × 5 =
  32. 32.41 × 50 =
  33. 33.63 × 5 =
  34. 34.59 × 5 =
  35. 35.39 × 50 =
  36. 36.92 × 50 =
  37. 37.49 × 50 =
  38. 38.35 × 5 =
  39. 39.65 × 5 =
  40. 40.79 × 50 =

Answer key

  1. 2500
  2. 400
  3. 750
  4. 225
  5. 280
  6. 3050
  7. 4000
  8. 1300
  9. 4200
  10. 950
  11. 3250
  12. 440
  13. 170
  14. 480
  15. 850
  16. 60
  17. 4100
  18. 185
  19. 160
  20. 800
  21. 270
  22. 4850
  23. 315
  24. 485
  25. 195
  26. 60
  27. 750
  28. 435
  29. 160
  30. 900
  31. 425
  32. 2050
  33. 315
  34. 295
  35. 1950
  36. 4600
  37. 2450
  38. 175
  39. 325
  40. 3950

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