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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 797 · 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. 1.90 × 50 =
  2. 2.46 × 5 =
  3. 3.39 × 50 =
  4. 4.35 × 50 =
  5. 5.46 × 5 =
  6. 6.68 × 5 =
  7. 7.14 × 50 =
  8. 8.29 × 5 =
  9. 9.64 × 5 =
  10. 10.46 × 50 =
  11. 11.55 × 5 =
  12. 12.77 × 50 =
  13. 13.39 × 50 =
  14. 14.49 × 50 =
  15. 15.50 × 5 =
  16. 16.18 × 50 =
  17. 17.48 × 50 =
  18. 18.36 × 5 =
  19. 19.29 × 5 =
  20. 20.80 × 50 =
  21. 21.41 × 50 =
  22. 22.20 × 50 =
  23. 23.62 × 50 =
  24. 24.93 × 5 =
  25. 25.45 × 5 =
  26. 26.25 × 5 =
  27. 27.45 × 50 =
  28. 28.88 × 50 =
  29. 29.29 × 5 =
  30. 30.33 × 5 =
  31. 31.98 × 50 =
  32. 32.35 × 5 =
  33. 33.77 × 5 =
  34. 34.89 × 5 =
  35. 35.64 × 5 =
  36. 36.69 × 5 =
  37. 37.25 × 5 =
  38. 38.69 × 5 =
  39. 39.28 × 50 =
  40. 40.81 × 50 =

Answer key

  1. 4500
  2. 230
  3. 1950
  4. 1750
  5. 230
  6. 340
  7. 700
  8. 145
  9. 320
  10. 2300
  11. 275
  12. 3850
  13. 1950
  14. 2450
  15. 250
  16. 900
  17. 2400
  18. 180
  19. 145
  20. 4000
  21. 2050
  22. 1000
  23. 3100
  24. 465
  25. 225
  26. 125
  27. 2250
  28. 4400
  29. 145
  30. 165
  31. 4900
  32. 175
  33. 385
  34. 445
  35. 320
  36. 345
  37. 125
  38. 345
  39. 1400
  40. 4050

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