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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 651 · 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. 1.20 × 5 =
  2. 2.90 × 5 =
  3. 3.42 × 50 =
  4. 4.69 × 5 =
  5. 5.16 × 50 =
  6. 6.20 × 5 =
  7. 7.16 × 50 =
  8. 8.15 × 5 =
  9. 9.34 × 50 =
  10. 10.63 × 5 =
  11. 11.94 × 50 =
  12. 12.28 × 50 =
  13. 13.15 × 5 =
  14. 14.31 × 5 =
  15. 15.66 × 5 =
  16. 16.80 × 5 =
  17. 17.92 × 50 =
  18. 18.98 × 5 =
  19. 19.17 × 50 =
  20. 20.91 × 5 =
  21. 21.36 × 5 =
  22. 22.48 × 50 =
  23. 23.16 × 50 =
  24. 24.21 × 50 =
  25. 25.19 × 50 =
  26. 26.19 × 50 =
  27. 27.26 × 5 =
  28. 28.17 × 50 =
  29. 29.86 × 50 =
  30. 30.47 × 5 =
  31. 31.38 × 50 =
  32. 32.83 × 50 =
  33. 33.80 × 5 =
  34. 34.94 × 50 =
  35. 35.32 × 50 =
  36. 36.60 × 5 =
  37. 37.24 × 5 =
  38. 38.42 × 5 =
  39. 39.77 × 50 =
  40. 40.18 × 5 =

Answer key

  1. 100
  2. 450
  3. 2100
  4. 345
  5. 800
  6. 100
  7. 800
  8. 75
  9. 1700
  10. 315
  11. 4700
  12. 1400
  13. 75
  14. 155
  15. 330
  16. 400
  17. 4600
  18. 490
  19. 850
  20. 455
  21. 180
  22. 2400
  23. 800
  24. 1050
  25. 950
  26. 950
  27. 130
  28. 850
  29. 4300
  30. 235
  31. 1900
  32. 4150
  33. 400
  34. 4700
  35. 1600
  36. 300
  37. 120
  38. 210
  39. 3850
  40. 90

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