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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 360 · 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. 1.27 × 5 =
  2. 2.34 × 50 =
  3. 3.71 × 50 =
  4. 4.96 × 50 =
  5. 5.54 × 5 =
  6. 6.85 × 50 =
  7. 7.45 × 50 =
  8. 8.37 × 50 =
  9. 9.13 × 50 =
  10. 10.69 × 50 =
  11. 11.70 × 5 =
  12. 12.15 × 50 =
  13. 13.51 × 50 =
  14. 14.46 × 50 =
  15. 15.26 × 50 =
  16. 16.74 × 5 =
  17. 17.45 × 5 =
  18. 18.91 × 50 =
  19. 19.26 × 50 =
  20. 20.24 × 50 =
  21. 21.39 × 5 =
  22. 22.27 × 5 =
  23. 23.66 × 50 =
  24. 24.68 × 5 =
  25. 25.19 × 50 =
  26. 26.64 × 5 =
  27. 27.80 × 5 =
  28. 28.59 × 5 =
  29. 29.13 × 5 =
  30. 30.76 × 50 =
  31. 31.80 × 50 =
  32. 32.33 × 50 =
  33. 33.91 × 5 =
  34. 34.34 × 50 =
  35. 35.45 × 5 =
  36. 36.60 × 50 =
  37. 37.20 × 5 =
  38. 38.57 × 50 =
  39. 39.51 × 50 =
  40. 40.48 × 5 =

Answer key

  1. 135
  2. 1700
  3. 3550
  4. 4800
  5. 270
  6. 4250
  7. 2250
  8. 1850
  9. 650
  10. 3450
  11. 350
  12. 750
  13. 2550
  14. 2300
  15. 1300
  16. 370
  17. 225
  18. 4550
  19. 1300
  20. 1200
  21. 195
  22. 135
  23. 3300
  24. 340
  25. 950
  26. 320
  27. 400
  28. 295
  29. 65
  30. 3800
  31. 4000
  32. 1650
  33. 455
  34. 1700
  35. 225
  36. 3000
  37. 100
  38. 2850
  39. 2550
  40. 240

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