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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 883 · 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. 1.20 × 50 =
  2. 2.36 × 5 =
  3. 3.27 × 5 =
  4. 4.79 × 50 =
  5. 5.73 × 50 =
  6. 6.27 × 50 =
  7. 7.21 × 5 =
  8. 8.19 × 5 =
  9. 9.62 × 50 =
  10. 10.34 × 5 =
  11. 11.69 × 50 =
  12. 12.33 × 50 =
  13. 13.36 × 5 =
  14. 14.87 × 5 =
  15. 15.58 × 50 =
  16. 16.69 × 5 =
  17. 17.33 × 50 =
  18. 18.22 × 50 =
  19. 19.73 × 5 =
  20. 20.80 × 50 =
  21. 21.12 × 50 =
  22. 22.59 × 5 =
  23. 23.90 × 5 =
  24. 24.44 × 50 =
  25. 25.25 × 5 =
  26. 26.94 × 50 =
  27. 27.79 × 5 =
  28. 28.81 × 5 =
  29. 29.27 × 50 =
  30. 30.98 × 5 =
  31. 31.71 × 50 =
  32. 32.53 × 50 =
  33. 33.57 × 50 =
  34. 34.13 × 50 =
  35. 35.27 × 50 =
  36. 36.16 × 5 =
  37. 37.27 × 5 =
  38. 38.71 × 5 =
  39. 39.24 × 5 =
  40. 40.57 × 5 =

Answer key

  1. 1000
  2. 180
  3. 135
  4. 3950
  5. 3650
  6. 1350
  7. 105
  8. 95
  9. 3100
  10. 170
  11. 3450
  12. 1650
  13. 180
  14. 435
  15. 2900
  16. 345
  17. 1650
  18. 1100
  19. 365
  20. 4000
  21. 600
  22. 295
  23. 450
  24. 2200
  25. 125
  26. 4700
  27. 395
  28. 405
  29. 1350
  30. 490
  31. 3550
  32. 2650
  33. 2850
  34. 650
  35. 1350
  36. 80
  37. 135
  38. 355
  39. 120
  40. 285

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