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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 875 · 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. 1.69 × 50 =
  2. 2.77 × 5 =
  3. 3.35 × 5 =
  4. 4.92 × 5 =
  5. 5.15 × 5 =
  6. 6.51 × 50 =
  7. 7.61 × 50 =
  8. 8.47 × 5 =
  9. 9.78 × 50 =
  10. 10.23 × 5 =
  11. 11.42 × 50 =
  12. 12.36 × 50 =
  13. 13.20 × 50 =
  14. 14.59 × 50 =
  15. 15.75 × 50 =
  16. 16.14 × 5 =
  17. 17.24 × 5 =
  18. 18.33 × 5 =
  19. 19.43 × 5 =
  20. 20.37 × 5 =
  21. 21.67 × 5 =
  22. 22.83 × 5 =
  23. 23.64 × 5 =
  24. 24.52 × 50 =
  25. 25.92 × 5 =
  26. 26.18 × 50 =
  27. 27.40 × 5 =
  28. 28.31 × 5 =
  29. 29.87 × 5 =
  30. 30.60 × 5 =
  31. 31.69 × 5 =
  32. 32.24 × 50 =
  33. 33.24 × 5 =
  34. 34.89 × 50 =
  35. 35.87 × 50 =
  36. 36.98 × 5 =
  37. 37.78 × 5 =
  38. 38.73 × 5 =
  39. 39.30 × 50 =
  40. 40.54 × 50 =

Answer key

  1. 3450
  2. 385
  3. 175
  4. 460
  5. 75
  6. 2550
  7. 3050
  8. 235
  9. 3900
  10. 115
  11. 2100
  12. 1800
  13. 1000
  14. 2950
  15. 3750
  16. 70
  17. 120
  18. 165
  19. 215
  20. 185
  21. 335
  22. 415
  23. 320
  24. 2600
  25. 460
  26. 900
  27. 200
  28. 155
  29. 435
  30. 300
  31. 345
  32. 1200
  33. 120
  34. 4450
  35. 4350
  36. 490
  37. 390
  38. 365
  39. 1500
  40. 2700

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