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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 90 · 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. 1.36 × 50 =
  2. 2.42 × 50 =
  3. 3.96 × 50 =
  4. 4.21 × 5 =
  5. 5.12 × 50 =
  6. 6.58 × 50 =
  7. 7.24 × 50 =
  8. 8.20 × 5 =
  9. 9.90 × 5 =
  10. 10.81 × 5 =
  11. 11.23 × 5 =
  12. 12.66 × 5 =
  13. 13.76 × 50 =
  14. 14.16 × 5 =
  15. 15.91 × 50 =
  16. 16.94 × 50 =
  17. 17.27 × 50 =
  18. 18.76 × 50 =
  19. 19.19 × 5 =
  20. 20.96 × 5 =
  21. 21.74 × 50 =
  22. 22.57 × 5 =
  23. 23.15 × 50 =
  24. 24.76 × 5 =
  25. 25.50 × 5 =
  26. 26.51 × 5 =
  27. 27.38 × 5 =
  28. 28.17 × 50 =
  29. 29.35 × 50 =
  30. 30.74 × 5 =
  31. 31.44 × 5 =
  32. 32.96 × 5 =
  33. 33.83 × 50 =
  34. 34.73 × 5 =
  35. 35.91 × 5 =
  36. 36.57 × 50 =
  37. 37.66 × 50 =
  38. 38.76 × 5 =
  39. 39.44 × 50 =
  40. 40.19 × 50 =

Answer key

  1. 1800
  2. 2100
  3. 4800
  4. 105
  5. 600
  6. 2900
  7. 1200
  8. 100
  9. 450
  10. 405
  11. 115
  12. 330
  13. 3800
  14. 80
  15. 4550
  16. 4700
  17. 1350
  18. 3800
  19. 95
  20. 480
  21. 3700
  22. 285
  23. 750
  24. 380
  25. 250
  26. 255
  27. 190
  28. 850
  29. 1750
  30. 370
  31. 220
  32. 480
  33. 4150
  34. 365
  35. 455
  36. 2850
  37. 3300
  38. 380
  39. 2200
  40. 950

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