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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 660 · 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. 1.98 × 5 =
  2. 2.20 × 5 =
  3. 3.67 × 50 =
  4. 4.16 × 50 =
  5. 5.60 × 50 =
  6. 6.24 × 50 =
  7. 7.54 × 5 =
  8. 8.70 × 5 =
  9. 9.65 × 5 =
  10. 10.92 × 50 =
  11. 11.52 × 50 =
  12. 12.20 × 50 =
  13. 13.23 × 5 =
  14. 14.43 × 50 =
  15. 15.87 × 5 =
  16. 16.27 × 50 =
  17. 17.33 × 5 =
  18. 18.36 × 5 =
  19. 19.73 × 5 =
  20. 20.69 × 50 =
  21. 21.45 × 50 =
  22. 22.24 × 5 =
  23. 23.38 × 50 =
  24. 24.60 × 50 =
  25. 25.66 × 5 =
  26. 26.48 × 5 =
  27. 27.22 × 5 =
  28. 28.42 × 50 =
  29. 29.87 × 5 =
  30. 30.16 × 50 =
  31. 31.79 × 50 =
  32. 32.23 × 50 =
  33. 33.77 × 50 =
  34. 34.89 × 50 =
  35. 35.16 × 5 =
  36. 36.30 × 50 =
  37. 37.57 × 5 =
  38. 38.54 × 5 =
  39. 39.19 × 5 =
  40. 40.25 × 50 =

Answer key

  1. 490
  2. 100
  3. 3350
  4. 800
  5. 3000
  6. 1200
  7. 270
  8. 350
  9. 325
  10. 4600
  11. 2600
  12. 1000
  13. 115
  14. 2150
  15. 435
  16. 1350
  17. 165
  18. 180
  19. 365
  20. 3450
  21. 2250
  22. 120
  23. 1900
  24. 3000
  25. 330
  26. 240
  27. 110
  28. 2100
  29. 435
  30. 800
  31. 3950
  32. 1150
  33. 3850
  34. 4450
  35. 80
  36. 1500
  37. 285
  38. 270
  39. 95
  40. 1250

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