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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 549 · 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. 1.18 × 5 =
  2. 2.67 × 5 =
  3. 3.40 × 50 =
  4. 4.44 × 5 =
  5. 5.47 × 50 =
  6. 6.54 × 5 =
  7. 7.30 × 5 =
  8. 8.37 × 50 =
  9. 9.80 × 5 =
  10. 10.75 × 5 =
  11. 11.70 × 50 =
  12. 12.95 × 50 =
  13. 13.58 × 5 =
  14. 14.58 × 5 =
  15. 15.81 × 5 =
  16. 16.15 × 5 =
  17. 17.16 × 5 =
  18. 18.80 × 5 =
  19. 19.60 × 5 =
  20. 20.38 × 5 =
  21. 21.41 × 50 =
  22. 22.69 × 5 =
  23. 23.25 × 50 =
  24. 24.31 × 50 =
  25. 25.88 × 5 =
  26. 26.51 × 50 =
  27. 27.65 × 5 =
  28. 28.71 × 5 =
  29. 29.95 × 50 =
  30. 30.88 × 5 =
  31. 31.37 × 5 =
  32. 32.69 × 50 =
  33. 33.26 × 50 =
  34. 34.43 × 50 =
  35. 35.14 × 5 =
  36. 36.80 × 5 =
  37. 37.54 × 50 =
  38. 38.47 × 50 =
  39. 39.42 × 5 =
  40. 40.66 × 50 =

Answer key

  1. 90
  2. 335
  3. 2000
  4. 220
  5. 2350
  6. 270
  7. 150
  8. 1850
  9. 400
  10. 375
  11. 3500
  12. 4750
  13. 290
  14. 290
  15. 405
  16. 75
  17. 80
  18. 400
  19. 300
  20. 190
  21. 2050
  22. 345
  23. 1250
  24. 1550
  25. 440
  26. 2550
  27. 325
  28. 355
  29. 4750
  30. 440
  31. 185
  32. 3450
  33. 1300
  34. 2150
  35. 70
  36. 400
  37. 2700
  38. 2350
  39. 210
  40. 3300

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