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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 906 · 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. 1.70 × 5 =
  2. 2.13 × 50 =
  3. 3.47 × 5 =
  4. 4.26 × 5 =
  5. 5.76 × 50 =
  6. 6.12 × 5 =
  7. 7.14 × 5 =
  8. 8.63 × 50 =
  9. 9.85 × 50 =
  10. 10.65 × 5 =
  11. 11.75 × 5 =
  12. 12.46 × 5 =
  13. 13.62 × 5 =
  14. 14.63 × 50 =
  15. 15.16 × 50 =
  16. 16.39 × 50 =
  17. 17.24 × 50 =
  18. 18.28 × 50 =
  19. 19.16 × 50 =
  20. 20.81 × 50 =
  21. 21.87 × 5 =
  22. 22.17 × 50 =
  23. 23.55 × 50 =
  24. 24.39 × 5 =
  25. 25.37 × 5 =
  26. 26.43 × 50 =
  27. 27.45 × 50 =
  28. 28.48 × 5 =
  29. 29.38 × 5 =
  30. 30.23 × 50 =
  31. 31.43 × 5 =
  32. 32.42 × 50 =
  33. 33.72 × 50 =
  34. 34.38 × 50 =
  35. 35.23 × 50 =
  36. 36.53 × 50 =
  37. 37.98 × 5 =
  38. 38.17 × 50 =
  39. 39.14 × 5 =
  40. 40.89 × 5 =

Answer key

  1. 350
  2. 650
  3. 235
  4. 130
  5. 3800
  6. 60
  7. 70
  8. 3150
  9. 4250
  10. 325
  11. 375
  12. 230
  13. 310
  14. 3150
  15. 800
  16. 1950
  17. 1200
  18. 1400
  19. 800
  20. 4050
  21. 435
  22. 850
  23. 2750
  24. 195
  25. 185
  26. 2150
  27. 2250
  28. 240
  29. 190
  30. 1150
  31. 215
  32. 2100
  33. 3600
  34. 1900
  35. 1150
  36. 2650
  37. 490
  38. 850
  39. 70
  40. 445

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