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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 248 · 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. 1.79 × 50 =
  2. 2.58 × 50 =
  3. 3.84 × 5 =
  4. 4.90 × 5 =
  5. 5.15 × 5 =
  6. 6.97 × 5 =
  7. 7.90 × 5 =
  8. 8.71 × 50 =
  9. 9.20 × 50 =
  10. 10.19 × 5 =
  11. 11.32 × 5 =
  12. 12.70 × 5 =
  13. 13.31 × 50 =
  14. 14.28 × 50 =
  15. 15.56 × 50 =
  16. 16.85 × 50 =
  17. 17.41 × 50 =
  18. 18.67 × 5 =
  19. 19.57 × 5 =
  20. 20.98 × 5 =
  21. 21.71 × 5 =
  22. 22.56 × 5 =
  23. 23.79 × 5 =
  24. 24.33 × 5 =
  25. 25.27 × 50 =
  26. 26.32 × 50 =
  27. 27.44 × 50 =
  28. 28.93 × 50 =
  29. 29.84 × 5 =
  30. 30.70 × 5 =
  31. 31.90 × 5 =
  32. 32.86 × 5 =
  33. 33.98 × 50 =
  34. 34.83 × 50 =
  35. 35.51 × 50 =
  36. 36.44 × 5 =
  37. 37.50 × 50 =
  38. 38.18 × 50 =
  39. 39.80 × 5 =
  40. 40.87 × 50 =

Answer key

  1. 3950
  2. 2900
  3. 420
  4. 450
  5. 75
  6. 485
  7. 450
  8. 3550
  9. 1000
  10. 95
  11. 160
  12. 350
  13. 1550
  14. 1400
  15. 2800
  16. 4250
  17. 2050
  18. 335
  19. 285
  20. 490
  21. 355
  22. 280
  23. 395
  24. 165
  25. 1350
  26. 1600
  27. 2200
  28. 4650
  29. 420
  30. 350
  31. 450
  32. 430
  33. 4900
  34. 4150
  35. 2550
  36. 220
  37. 2500
  38. 900
  39. 400
  40. 4350

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