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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 885 · 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. 1.67 × 50 =
  2. 2.38 × 5 =
  3. 3.12 × 5 =
  4. 4.65 × 5 =
  5. 5.36 × 5 =
  6. 6.31 × 5 =
  7. 7.19 × 5 =
  8. 8.33 × 50 =
  9. 9.22 × 50 =
  10. 10.67 × 5 =
  11. 11.48 × 50 =
  12. 12.35 × 50 =
  13. 13.48 × 5 =
  14. 14.57 × 50 =
  15. 15.71 × 5 =
  16. 16.65 × 50 =
  17. 17.41 × 50 =
  18. 18.29 × 50 =
  19. 19.91 × 50 =
  20. 20.29 × 50 =
  21. 21.91 × 5 =
  22. 22.72 × 5 =
  23. 23.30 × 50 =
  24. 24.38 × 50 =
  25. 25.69 × 50 =
  26. 26.83 × 50 =
  27. 27.72 × 5 =
  28. 28.84 × 5 =
  29. 29.60 × 5 =
  30. 30.60 × 5 =
  31. 31.72 × 5 =
  32. 32.67 × 5 =
  33. 33.26 × 5 =
  34. 34.42 × 50 =
  35. 35.23 × 50 =
  36. 36.29 × 5 =
  37. 37.75 × 50 =
  38. 38.80 × 5 =
  39. 39.27 × 5 =
  40. 40.93 × 5 =

Answer key

  1. 3350
  2. 190
  3. 60
  4. 325
  5. 180
  6. 155
  7. 95
  8. 1650
  9. 1100
  10. 335
  11. 2400
  12. 1750
  13. 240
  14. 2850
  15. 355
  16. 3250
  17. 2050
  18. 1450
  19. 4550
  20. 1450
  21. 455
  22. 360
  23. 1500
  24. 1900
  25. 3450
  26. 4150
  27. 360
  28. 420
  29. 300
  30. 300
  31. 360
  32. 335
  33. 130
  34. 2100
  35. 1150
  36. 145
  37. 3750
  38. 400
  39. 135
  40. 465

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