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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 715 · 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. 1.25 × 5 =
  2. 2.89 × 50 =
  3. 3.79 × 5 =
  4. 4.42 × 50 =
  5. 5.62 × 5 =
  6. 6.13 × 5 =
  7. 7.13 × 50 =
  8. 8.82 × 5 =
  9. 9.89 × 50 =
  10. 10.27 × 5 =
  11. 11.32 × 50 =
  12. 12.97 × 5 =
  13. 13.29 × 5 =
  14. 14.94 × 5 =
  15. 15.84 × 5 =
  16. 16.16 × 50 =
  17. 17.80 × 50 =
  18. 18.34 × 50 =
  19. 19.67 × 5 =
  20. 20.80 × 5 =
  21. 21.65 × 5 =
  22. 22.55 × 5 =
  23. 23.66 × 50 =
  24. 24.86 × 5 =
  25. 25.77 × 50 =
  26. 26.72 × 50 =
  27. 27.18 × 50 =
  28. 28.80 × 50 =
  29. 29.29 × 50 =
  30. 30.89 × 50 =
  31. 31.38 × 5 =
  32. 32.51 × 5 =
  33. 33.36 × 50 =
  34. 34.86 × 50 =
  35. 35.89 × 50 =
  36. 36.44 × 50 =
  37. 37.98 × 5 =
  38. 38.49 × 50 =
  39. 39.37 × 50 =
  40. 40.63 × 50 =

Answer key

  1. 125
  2. 4450
  3. 395
  4. 2100
  5. 310
  6. 65
  7. 650
  8. 410
  9. 4450
  10. 135
  11. 1600
  12. 485
  13. 145
  14. 470
  15. 420
  16. 800
  17. 4000
  18. 1700
  19. 335
  20. 400
  21. 325
  22. 275
  23. 3300
  24. 430
  25. 3850
  26. 3600
  27. 900
  28. 4000
  29. 1450
  30. 4450
  31. 190
  32. 255
  33. 1800
  34. 4300
  35. 4450
  36. 2200
  37. 490
  38. 2450
  39. 1850
  40. 3150

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