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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 921 · 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. 1.93 × 5 =
  2. 2.89 × 5 =
  3. 3.17 × 50 =
  4. 4.19 × 5 =
  5. 5.54 × 50 =
  6. 6.22 × 5 =
  7. 7.86 × 5 =
  8. 8.65 × 5 =
  9. 9.86 × 50 =
  10. 10.95 × 50 =
  11. 11.62 × 5 =
  12. 12.59 × 50 =
  13. 13.61 × 5 =
  14. 14.31 × 50 =
  15. 15.26 × 5 =
  16. 16.79 × 50 =
  17. 17.70 × 5 =
  18. 18.14 × 50 =
  19. 19.64 × 5 =
  20. 20.60 × 5 =
  21. 21.20 × 5 =
  22. 22.93 × 5 =
  23. 23.78 × 5 =
  24. 24.22 × 5 =
  25. 25.74 × 5 =
  26. 26.32 × 5 =
  27. 27.25 × 5 =
  28. 28.17 × 50 =
  29. 29.36 × 5 =
  30. 30.31 × 50 =
  31. 31.30 × 5 =
  32. 32.31 × 5 =
  33. 33.63 × 5 =
  34. 34.65 × 50 =
  35. 35.67 × 5 =
  36. 36.18 × 5 =
  37. 37.74 × 50 =
  38. 38.83 × 5 =
  39. 39.21 × 50 =
  40. 40.15 × 5 =

Answer key

  1. 465
  2. 445
  3. 850
  4. 95
  5. 2700
  6. 110
  7. 430
  8. 325
  9. 4300
  10. 4750
  11. 310
  12. 2950
  13. 305
  14. 1550
  15. 130
  16. 3950
  17. 350
  18. 700
  19. 320
  20. 300
  21. 100
  22. 465
  23. 390
  24. 110
  25. 370
  26. 160
  27. 125
  28. 850
  29. 180
  30. 1550
  31. 150
  32. 155
  33. 315
  34. 3250
  35. 335
  36. 90
  37. 3700
  38. 415
  39. 1050
  40. 75

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