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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 509 · 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. 1.74 × 50 =
  2. 2.15 × 5 =
  3. 3.57 × 5 =
  4. 4.38 × 5 =
  5. 5.64 × 5 =
  6. 6.37 × 5 =
  7. 7.69 × 50 =
  8. 8.16 × 50 =
  9. 9.46 × 50 =
  10. 10.17 × 5 =
  11. 11.61 × 50 =
  12. 12.78 × 50 =
  13. 13.37 × 50 =
  14. 14.36 × 5 =
  15. 15.21 × 50 =
  16. 16.35 × 50 =
  17. 17.82 × 5 =
  18. 18.90 × 5 =
  19. 19.74 × 50 =
  20. 20.27 × 50 =
  21. 21.36 × 5 =
  22. 22.87 × 5 =
  23. 23.95 × 50 =
  24. 24.96 × 5 =
  25. 25.25 × 5 =
  26. 26.93 × 5 =
  27. 27.25 × 50 =
  28. 28.52 × 5 =
  29. 29.21 × 50 =
  30. 30.39 × 50 =
  31. 31.64 × 50 =
  32. 32.35 × 50 =
  33. 33.89 × 5 =
  34. 34.33 × 5 =
  35. 35.58 × 5 =
  36. 36.85 × 50 =
  37. 37.62 × 5 =
  38. 38.91 × 50 =
  39. 39.98 × 50 =
  40. 40.43 × 5 =

Answer key

  1. 3700
  2. 75
  3. 285
  4. 190
  5. 320
  6. 185
  7. 3450
  8. 800
  9. 2300
  10. 85
  11. 3050
  12. 3900
  13. 1850
  14. 180
  15. 1050
  16. 1750
  17. 410
  18. 450
  19. 3700
  20. 1350
  21. 180
  22. 435
  23. 4750
  24. 480
  25. 125
  26. 465
  27. 1250
  28. 260
  29. 1050
  30. 1950
  31. 3200
  32. 1750
  33. 445
  34. 165
  35. 290
  36. 4250
  37. 310
  38. 4550
  39. 4900
  40. 215

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