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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 829 · 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. 1.66 × 50 =
  2. 2.16 × 50 =
  3. 3.70 × 5 =
  4. 4.86 × 5 =
  5. 5.17 × 50 =
  6. 6.53 × 5 =
  7. 7.95 × 50 =
  8. 8.23 × 50 =
  9. 9.17 × 5 =
  10. 10.19 × 50 =
  11. 11.29 × 5 =
  12. 12.17 × 50 =
  13. 13.14 × 5 =
  14. 14.64 × 5 =
  15. 15.17 × 50 =
  16. 16.45 × 50 =
  17. 17.21 × 50 =
  18. 18.44 × 50 =
  19. 19.85 × 50 =
  20. 20.27 × 50 =
  21. 21.51 × 50 =
  22. 22.73 × 50 =
  23. 23.48 × 5 =
  24. 24.78 × 50 =
  25. 25.36 × 50 =
  26. 26.82 × 50 =
  27. 27.14 × 50 =
  28. 28.61 × 5 =
  29. 29.39 × 50 =
  30. 30.67 × 50 =
  31. 31.20 × 5 =
  32. 32.71 × 50 =
  33. 33.91 × 50 =
  34. 34.49 × 50 =
  35. 35.70 × 50 =
  36. 36.23 × 5 =
  37. 37.15 × 5 =
  38. 38.80 × 5 =
  39. 39.90 × 50 =
  40. 40.87 × 50 =

Answer key

  1. 3300
  2. 800
  3. 350
  4. 430
  5. 850
  6. 265
  7. 4750
  8. 1150
  9. 85
  10. 950
  11. 145
  12. 850
  13. 70
  14. 320
  15. 850
  16. 2250
  17. 1050
  18. 2200
  19. 4250
  20. 1350
  21. 2550
  22. 3650
  23. 240
  24. 3900
  25. 1800
  26. 4100
  27. 700
  28. 305
  29. 1950
  30. 3350
  31. 100
  32. 3550
  33. 4550
  34. 2450
  35. 3500
  36. 115
  37. 75
  38. 400
  39. 4500
  40. 4350

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