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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 858 · 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. 1.18 × 5 =
  2. 2.85 × 50 =
  3. 3.48 × 5 =
  4. 4.62 × 5 =
  5. 5.14 × 5 =
  6. 6.36 × 5 =
  7. 7.62 × 5 =
  8. 8.21 × 5 =
  9. 9.27 × 50 =
  10. 10.75 × 5 =
  11. 11.26 × 50 =
  12. 12.65 × 5 =
  13. 13.24 × 50 =
  14. 14.18 × 5 =
  15. 15.23 × 5 =
  16. 16.32 × 5 =
  17. 17.65 × 5 =
  18. 18.41 × 5 =
  19. 19.61 × 5 =
  20. 20.18 × 5 =
  21. 21.24 × 5 =
  22. 22.76 × 5 =
  23. 23.67 × 5 =
  24. 24.83 × 5 =
  25. 25.58 × 5 =
  26. 26.81 × 5 =
  27. 27.22 × 50 =
  28. 28.71 × 5 =
  29. 29.34 × 5 =
  30. 30.94 × 50 =
  31. 31.60 × 50 =
  32. 32.20 × 50 =
  33. 33.74 × 50 =
  34. 34.59 × 50 =
  35. 35.51 × 50 =
  36. 36.29 × 50 =
  37. 37.43 × 5 =
  38. 38.42 × 50 =
  39. 39.31 × 50 =
  40. 40.89 × 5 =

Answer key

  1. 90
  2. 4250
  3. 240
  4. 310
  5. 70
  6. 180
  7. 310
  8. 105
  9. 1350
  10. 375
  11. 1300
  12. 325
  13. 1200
  14. 90
  15. 115
  16. 160
  17. 325
  18. 205
  19. 305
  20. 90
  21. 120
  22. 380
  23. 335
  24. 415
  25. 290
  26. 405
  27. 1100
  28. 355
  29. 170
  30. 4700
  31. 3000
  32. 1000
  33. 3700
  34. 2950
  35. 2550
  36. 1450
  37. 215
  38. 2100
  39. 1550
  40. 445

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