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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 470 · 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. 1.48 × 5 =
  2. 2.28 × 5 =
  3. 3.43 × 50 =
  4. 4.34 × 50 =
  5. 5.96 × 50 =
  6. 6.41 × 5 =
  7. 7.76 × 50 =
  8. 8.68 × 50 =
  9. 9.96 × 50 =
  10. 10.38 × 50 =
  11. 11.13 × 50 =
  12. 12.82 × 50 =
  13. 13.37 × 50 =
  14. 14.81 × 5 =
  15. 15.57 × 5 =
  16. 16.38 × 5 =
  17. 17.76 × 5 =
  18. 18.62 × 5 =
  19. 19.28 × 5 =
  20. 20.25 × 50 =
  21. 21.91 × 50 =
  22. 22.41 × 5 =
  23. 23.67 × 50 =
  24. 24.41 × 5 =
  25. 25.39 × 50 =
  26. 26.19 × 5 =
  27. 27.48 × 50 =
  28. 28.64 × 5 =
  29. 29.51 × 5 =
  30. 30.46 × 5 =
  31. 31.29 × 5 =
  32. 32.38 × 50 =
  33. 33.61 × 5 =
  34. 34.14 × 5 =
  35. 35.46 × 50 =
  36. 36.75 × 5 =
  37. 37.50 × 5 =
  38. 38.64 × 5 =
  39. 39.67 × 50 =
  40. 40.40 × 5 =

Answer key

  1. 240
  2. 140
  3. 2150
  4. 1700
  5. 4800
  6. 205
  7. 3800
  8. 3400
  9. 4800
  10. 1900
  11. 650
  12. 4100
  13. 1850
  14. 405
  15. 285
  16. 190
  17. 380
  18. 310
  19. 140
  20. 1250
  21. 4550
  22. 205
  23. 3350
  24. 205
  25. 1950
  26. 95
  27. 2400
  28. 320
  29. 255
  30. 230
  31. 145
  32. 1900
  33. 305
  34. 70
  35. 2300
  36. 375
  37. 250
  38. 320
  39. 3350
  40. 200

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