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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 983 · 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. 1.45 × 5 =
  2. 2.19 × 5 =
  3. 3.85 × 50 =
  4. 4.14 × 5 =
  5. 5.58 × 5 =
  6. 6.35 × 5 =
  7. 7.12 × 50 =
  8. 8.39 × 50 =
  9. 9.34 × 5 =
  10. 10.44 × 5 =
  11. 11.63 × 5 =
  12. 12.45 × 5 =
  13. 13.25 × 50 =
  14. 14.65 × 50 =
  15. 15.87 × 5 =
  16. 16.68 × 50 =
  17. 17.16 × 50 =
  18. 18.75 × 5 =
  19. 19.26 × 50 =
  20. 20.15 × 50 =
  21. 21.79 × 5 =
  22. 22.45 × 50 =
  23. 23.71 × 50 =
  24. 24.68 × 50 =
  25. 25.91 × 5 =
  26. 26.59 × 5 =
  27. 27.14 × 5 =
  28. 28.33 × 5 =
  29. 29.54 × 50 =
  30. 30.13 × 5 =
  31. 31.13 × 50 =
  32. 32.56 × 50 =
  33. 33.79 × 5 =
  34. 34.60 × 5 =
  35. 35.37 × 5 =
  36. 36.41 × 50 =
  37. 37.42 × 50 =
  38. 38.15 × 5 =
  39. 39.39 × 50 =
  40. 40.35 × 50 =

Answer key

  1. 225
  2. 95
  3. 4250
  4. 70
  5. 290
  6. 175
  7. 600
  8. 1950
  9. 170
  10. 220
  11. 315
  12. 225
  13. 1250
  14. 3250
  15. 435
  16. 3400
  17. 800
  18. 375
  19. 1300
  20. 750
  21. 395
  22. 2250
  23. 3550
  24. 3400
  25. 455
  26. 295
  27. 70
  28. 165
  29. 2700
  30. 65
  31. 650
  32. 2800
  33. 395
  34. 300
  35. 185
  36. 2050
  37. 2100
  38. 75
  39. 1950
  40. 1750

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