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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 472 · 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. 1.30 × 5 =
  2. 2.30 × 5 =
  3. 3.98 × 50 =
  4. 4.77 × 5 =
  5. 5.83 × 5 =
  6. 6.40 × 5 =
  7. 7.19 × 5 =
  8. 8.46 × 50 =
  9. 9.75 × 5 =
  10. 10.13 × 50 =
  11. 11.22 × 50 =
  12. 12.22 × 50 =
  13. 13.36 × 5 =
  14. 14.75 × 5 =
  15. 15.37 × 5 =
  16. 16.35 × 5 =
  17. 17.57 × 50 =
  18. 18.33 × 50 =
  19. 19.29 × 50 =
  20. 20.84 × 50 =
  21. 21.58 × 50 =
  22. 22.75 × 5 =
  23. 23.96 × 50 =
  24. 24.84 × 50 =
  25. 25.17 × 5 =
  26. 26.19 × 5 =
  27. 27.51 × 50 =
  28. 28.38 × 50 =
  29. 29.80 × 50 =
  30. 30.52 × 5 =
  31. 31.57 × 5 =
  32. 32.90 × 5 =
  33. 33.49 × 5 =
  34. 34.97 × 5 =
  35. 35.42 × 5 =
  36. 36.35 × 50 =
  37. 37.57 × 5 =
  38. 38.17 × 5 =
  39. 39.98 × 50 =
  40. 40.59 × 5 =

Answer key

  1. 150
  2. 150
  3. 4900
  4. 385
  5. 415
  6. 200
  7. 95
  8. 2300
  9. 375
  10. 650
  11. 1100
  12. 1100
  13. 180
  14. 375
  15. 185
  16. 175
  17. 2850
  18. 1650
  19. 1450
  20. 4200
  21. 2900
  22. 375
  23. 4800
  24. 4200
  25. 85
  26. 95
  27. 2550
  28. 1900
  29. 4000
  30. 260
  31. 285
  32. 450
  33. 245
  34. 485
  35. 210
  36. 1750
  37. 285
  38. 85
  39. 4900
  40. 295

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