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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 243 · 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. 1.25 × 5 =
  2. 2.79 × 5 =
  3. 3.12 × 50 =
  4. 4.30 × 5 =
  5. 5.16 × 5 =
  6. 6.37 × 5 =
  7. 7.18 × 5 =
  8. 8.14 × 5 =
  9. 9.90 × 5 =
  10. 10.79 × 5 =
  11. 11.87 × 50 =
  12. 12.34 × 5 =
  13. 13.54 × 50 =
  14. 14.44 × 50 =
  15. 15.28 × 5 =
  16. 16.33 × 50 =
  17. 17.67 × 50 =
  18. 18.16 × 5 =
  19. 19.64 × 5 =
  20. 20.93 × 50 =
  21. 21.33 × 5 =
  22. 22.34 × 5 =
  23. 23.58 × 5 =
  24. 24.98 × 5 =
  25. 25.35 × 5 =
  26. 26.54 × 50 =
  27. 27.49 × 50 =
  28. 28.91 × 50 =
  29. 29.29 × 50 =
  30. 30.34 × 5 =
  31. 31.39 × 5 =
  32. 32.77 × 5 =
  33. 33.89 × 50 =
  34. 34.54 × 5 =
  35. 35.36 × 50 =
  36. 36.82 × 5 =
  37. 37.21 × 50 =
  38. 38.17 × 5 =
  39. 39.94 × 50 =
  40. 40.70 × 50 =

Answer key

  1. 125
  2. 395
  3. 600
  4. 150
  5. 80
  6. 185
  7. 90
  8. 70
  9. 450
  10. 395
  11. 4350
  12. 170
  13. 2700
  14. 2200
  15. 140
  16. 1650
  17. 3350
  18. 80
  19. 320
  20. 4650
  21. 165
  22. 170
  23. 290
  24. 490
  25. 175
  26. 2700
  27. 2450
  28. 4550
  29. 1450
  30. 170
  31. 195
  32. 385
  33. 4450
  34. 270
  35. 1800
  36. 410
  37. 1050
  38. 85
  39. 4700
  40. 3500

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