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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 846 · 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. 1.57 × 50 =
  2. 2.68 × 50 =
  3. 3.35 × 50 =
  4. 4.88 × 50 =
  5. 5.37 × 5 =
  6. 6.61 × 50 =
  7. 7.29 × 5 =
  8. 8.42 × 50 =
  9. 9.34 × 50 =
  10. 10.22 × 50 =
  11. 11.57 × 50 =
  12. 12.97 × 5 =
  13. 13.62 × 50 =
  14. 14.32 × 5 =
  15. 15.18 × 5 =
  16. 16.94 × 50 =
  17. 17.64 × 50 =
  18. 18.26 × 50 =
  19. 19.34 × 5 =
  20. 20.79 × 50 =
  21. 21.69 × 50 =
  22. 22.95 × 50 =
  23. 23.31 × 5 =
  24. 24.36 × 5 =
  25. 25.53 × 5 =
  26. 26.45 × 5 =
  27. 27.57 × 5 =
  28. 28.94 × 5 =
  29. 29.30 × 50 =
  30. 30.88 × 5 =
  31. 31.49 × 5 =
  32. 32.40 × 5 =
  33. 33.33 × 5 =
  34. 34.25 × 5 =
  35. 35.73 × 5 =
  36. 36.51 × 5 =
  37. 37.20 × 50 =
  38. 38.15 × 5 =
  39. 39.45 × 5 =
  40. 40.75 × 5 =

Answer key

  1. 2850
  2. 3400
  3. 1750
  4. 4400
  5. 185
  6. 3050
  7. 145
  8. 2100
  9. 1700
  10. 1100
  11. 2850
  12. 485
  13. 3100
  14. 160
  15. 90
  16. 4700
  17. 3200
  18. 1300
  19. 170
  20. 3950
  21. 3450
  22. 4750
  23. 155
  24. 180
  25. 265
  26. 225
  27. 285
  28. 470
  29. 1500
  30. 440
  31. 245
  32. 200
  33. 165
  34. 125
  35. 365
  36. 255
  37. 1000
  38. 75
  39. 225
  40. 375

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