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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 46 · 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. 1.81 × 5 =
  2. 2.59 × 5 =
  3. 3.15 × 5 =
  4. 4.41 × 50 =
  5. 5.82 × 5 =
  6. 6.97 × 50 =
  7. 7.47 × 5 =
  8. 8.69 × 50 =
  9. 9.12 × 50 =
  10. 10.61 × 50 =
  11. 11.47 × 50 =
  12. 12.78 × 50 =
  13. 13.45 × 50 =
  14. 14.12 × 5 =
  15. 15.70 × 50 =
  16. 16.37 × 5 =
  17. 17.88 × 50 =
  18. 18.96 × 50 =
  19. 19.61 × 50 =
  20. 20.55 × 5 =
  21. 21.36 × 50 =
  22. 22.14 × 50 =
  23. 23.91 × 5 =
  24. 24.74 × 5 =
  25. 25.16 × 50 =
  26. 26.46 × 50 =
  27. 27.63 × 50 =
  28. 28.87 × 5 =
  29. 29.70 × 5 =
  30. 30.77 × 5 =
  31. 31.30 × 50 =
  32. 32.37 × 5 =
  33. 33.27 × 50 =
  34. 34.97 × 50 =
  35. 35.67 × 5 =
  36. 36.80 × 50 =
  37. 37.32 × 5 =
  38. 38.87 × 5 =
  39. 39.95 × 50 =
  40. 40.34 × 5 =

Answer key

  1. 405
  2. 295
  3. 75
  4. 2050
  5. 410
  6. 4850
  7. 235
  8. 3450
  9. 600
  10. 3050
  11. 2350
  12. 3900
  13. 2250
  14. 60
  15. 3500
  16. 185
  17. 4400
  18. 4800
  19. 3050
  20. 275
  21. 1800
  22. 700
  23. 455
  24. 370
  25. 800
  26. 2300
  27. 3150
  28. 435
  29. 350
  30. 385
  31. 1500
  32. 185
  33. 1350
  34. 4850
  35. 335
  36. 4000
  37. 160
  38. 435
  39. 4750
  40. 170

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