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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 141 · 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. 1.48 × 5 =
  2. 2.27 × 5 =
  3. 3.45 × 5 =
  4. 4.96 × 50 =
  5. 5.15 × 50 =
  6. 6.34 × 5 =
  7. 7.21 × 5 =
  8. 8.20 × 50 =
  9. 9.74 × 50 =
  10. 10.39 × 50 =
  11. 11.17 × 5 =
  12. 12.79 × 5 =
  13. 13.77 × 5 =
  14. 14.16 × 5 =
  15. 15.57 × 5 =
  16. 16.87 × 50 =
  17. 17.17 × 5 =
  18. 18.22 × 5 =
  19. 19.94 × 5 =
  20. 20.82 × 5 =
  21. 21.23 × 5 =
  22. 22.75 × 5 =
  23. 23.69 × 50 =
  24. 24.26 × 50 =
  25. 25.60 × 5 =
  26. 26.38 × 5 =
  27. 27.80 × 50 =
  28. 28.12 × 5 =
  29. 29.78 × 5 =
  30. 30.68 × 5 =
  31. 31.53 × 50 =
  32. 32.74 × 5 =
  33. 33.39 × 5 =
  34. 34.55 × 50 =
  35. 35.16 × 5 =
  36. 36.65 × 5 =
  37. 37.53 × 50 =
  38. 38.97 × 50 =
  39. 39.61 × 50 =
  40. 40.46 × 5 =

Answer key

  1. 240
  2. 135
  3. 225
  4. 4800
  5. 750
  6. 170
  7. 105
  8. 1000
  9. 3700
  10. 1950
  11. 85
  12. 395
  13. 385
  14. 80
  15. 285
  16. 4350
  17. 85
  18. 110
  19. 470
  20. 410
  21. 115
  22. 375
  23. 3450
  24. 1300
  25. 300
  26. 190
  27. 4000
  28. 60
  29. 390
  30. 340
  31. 2650
  32. 370
  33. 195
  34. 2750
  35. 80
  36. 325
  37. 2650
  38. 4850
  39. 3050
  40. 230

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