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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 938 · 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. 1.43 × 5 =
  2. 2.57 × 50 =
  3. 3.18 × 50 =
  4. 4.92 × 50 =
  5. 5.24 × 50 =
  6. 6.79 × 50 =
  7. 7.18 × 5 =
  8. 8.68 × 50 =
  9. 9.81 × 5 =
  10. 10.41 × 50 =
  11. 11.73 × 5 =
  12. 12.85 × 50 =
  13. 13.36 × 50 =
  14. 14.58 × 50 =
  15. 15.40 × 5 =
  16. 16.22 × 50 =
  17. 17.73 × 5 =
  18. 18.78 × 5 =
  19. 19.62 × 5 =
  20. 20.39 × 50 =
  21. 21.95 × 50 =
  22. 22.57 × 5 =
  23. 23.63 × 5 =
  24. 24.66 × 50 =
  25. 25.23 × 50 =
  26. 26.60 × 5 =
  27. 27.20 × 50 =
  28. 28.32 × 5 =
  29. 29.46 × 5 =
  30. 30.13 × 50 =
  31. 31.72 × 50 =
  32. 32.62 × 5 =
  33. 33.51 × 50 =
  34. 34.53 × 5 =
  35. 35.66 × 50 =
  36. 36.12 × 50 =
  37. 37.72 × 5 =
  38. 38.17 × 5 =
  39. 39.64 × 50 =
  40. 40.98 × 50 =

Answer key

  1. 215
  2. 2850
  3. 900
  4. 4600
  5. 1200
  6. 3950
  7. 90
  8. 3400
  9. 405
  10. 2050
  11. 365
  12. 4250
  13. 1800
  14. 2900
  15. 200
  16. 1100
  17. 365
  18. 390
  19. 310
  20. 1950
  21. 4750
  22. 285
  23. 315
  24. 3300
  25. 1150
  26. 300
  27. 1000
  28. 160
  29. 230
  30. 650
  31. 3600
  32. 310
  33. 2550
  34. 265
  35. 3300
  36. 600
  37. 360
  38. 85
  39. 3200
  40. 4900

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