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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 22 · 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. 1.72 × 5 =
  2. 2.53 × 5 =
  3. 3.98 × 50 =
  4. 4.48 × 5 =
  5. 5.41 × 5 =
  6. 6.69 × 50 =
  7. 7.88 × 5 =
  8. 8.70 × 50 =
  9. 9.76 × 50 =
  10. 10.57 × 50 =
  11. 11.27 × 50 =
  12. 12.52 × 5 =
  13. 13.65 × 5 =
  14. 14.97 × 5 =
  15. 15.72 × 5 =
  16. 16.75 × 5 =
  17. 17.87 × 50 =
  18. 18.14 × 50 =
  19. 19.89 × 5 =
  20. 20.72 × 5 =
  21. 21.44 × 50 =
  22. 22.44 × 5 =
  23. 23.76 × 50 =
  24. 24.39 × 5 =
  25. 25.15 × 50 =
  26. 26.66 × 50 =
  27. 27.69 × 50 =
  28. 28.42 × 5 =
  29. 29.15 × 50 =
  30. 30.42 × 50 =
  31. 31.55 × 5 =
  32. 32.19 × 5 =
  33. 33.64 × 5 =
  34. 34.61 × 5 =
  35. 35.72 × 5 =
  36. 36.40 × 5 =
  37. 37.37 × 50 =
  38. 38.94 × 50 =
  39. 39.17 × 50 =
  40. 40.15 × 5 =

Answer key

  1. 360
  2. 265
  3. 4900
  4. 240
  5. 205
  6. 3450
  7. 440
  8. 3500
  9. 3800
  10. 2850
  11. 1350
  12. 260
  13. 325
  14. 485
  15. 360
  16. 375
  17. 4350
  18. 700
  19. 445
  20. 360
  21. 2200
  22. 220
  23. 3800
  24. 195
  25. 750
  26. 3300
  27. 3450
  28. 210
  29. 750
  30. 2100
  31. 275
  32. 95
  33. 320
  34. 305
  35. 360
  36. 200
  37. 1850
  38. 4700
  39. 850
  40. 75

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