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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 254 · 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. 1.24 × 50 =
  2. 2.79 × 50 =
  3. 3.92 × 5 =
  4. 4.20 × 50 =
  5. 5.15 × 5 =
  6. 6.86 × 50 =
  7. 7.94 × 50 =
  8. 8.65 × 50 =
  9. 9.74 × 50 =
  10. 10.58 × 50 =
  11. 11.30 × 50 =
  12. 12.48 × 5 =
  13. 13.89 × 5 =
  14. 14.30 × 50 =
  15. 15.95 × 50 =
  16. 16.80 × 5 =
  17. 17.16 × 5 =
  18. 18.75 × 5 =
  19. 19.21 × 50 =
  20. 20.24 × 50 =
  21. 21.42 × 50 =
  22. 22.45 × 50 =
  23. 23.26 × 5 =
  24. 24.48 × 50 =
  25. 25.90 × 50 =
  26. 26.33 × 5 =
  27. 27.22 × 5 =
  28. 28.57 × 5 =
  29. 29.37 × 50 =
  30. 30.28 × 5 =
  31. 31.57 × 50 =
  32. 32.20 × 50 =
  33. 33.92 × 5 =
  34. 34.91 × 5 =
  35. 35.56 × 50 =
  36. 36.27 × 5 =
  37. 37.32 × 50 =
  38. 38.40 × 50 =
  39. 39.14 × 50 =
  40. 40.58 × 5 =

Answer key

  1. 1200
  2. 3950
  3. 460
  4. 1000
  5. 75
  6. 4300
  7. 4700
  8. 3250
  9. 3700
  10. 2900
  11. 1500
  12. 240
  13. 445
  14. 1500
  15. 4750
  16. 400
  17. 80
  18. 375
  19. 1050
  20. 1200
  21. 2100
  22. 2250
  23. 130
  24. 2400
  25. 4500
  26. 165
  27. 110
  28. 285
  29. 1850
  30. 140
  31. 2850
  32. 1000
  33. 460
  34. 455
  35. 2800
  36. 135
  37. 1600
  38. 2000
  39. 700
  40. 290

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