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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 868 · 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. 1.43 × 50 =
  2. 2.18 × 5 =
  3. 3.65 × 50 =
  4. 4.65 × 50 =
  5. 5.80 × 5 =
  6. 6.69 × 50 =
  7. 7.78 × 50 =
  8. 8.97 × 5 =
  9. 9.26 × 50 =
  10. 10.91 × 50 =
  11. 11.56 × 5 =
  12. 12.42 × 50 =
  13. 13.76 × 50 =
  14. 14.19 × 50 =
  15. 15.31 × 50 =
  16. 16.40 × 5 =
  17. 17.12 × 50 =
  18. 18.21 × 50 =
  19. 19.13 × 5 =
  20. 20.55 × 50 =
  21. 21.76 × 50 =
  22. 22.84 × 50 =
  23. 23.92 × 5 =
  24. 24.28 × 50 =
  25. 25.20 × 5 =
  26. 26.59 × 5 =
  27. 27.13 × 5 =
  28. 28.61 × 5 =
  29. 29.12 × 5 =
  30. 30.68 × 5 =
  31. 31.76 × 5 =
  32. 32.74 × 50 =
  33. 33.15 × 5 =
  34. 34.20 × 50 =
  35. 35.25 × 5 =
  36. 36.33 × 5 =
  37. 37.80 × 50 =
  38. 38.17 × 5 =
  39. 39.12 × 5 =
  40. 40.31 × 50 =

Answer key

  1. 2150
  2. 90
  3. 3250
  4. 3250
  5. 400
  6. 3450
  7. 3900
  8. 485
  9. 1300
  10. 4550
  11. 280
  12. 2100
  13. 3800
  14. 950
  15. 1550
  16. 200
  17. 600
  18. 1050
  19. 65
  20. 2750
  21. 3800
  22. 4200
  23. 460
  24. 1400
  25. 100
  26. 295
  27. 65
  28. 305
  29. 60
  30. 340
  31. 380
  32. 3700
  33. 75
  34. 1000
  35. 125
  36. 165
  37. 4000
  38. 85
  39. 60
  40. 1550

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