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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 685 · 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. 1.83 × 5 =
  2. 2.44 × 50 =
  3. 3.75 × 50 =
  4. 4.73 × 5 =
  5. 5.34 × 50 =
  6. 6.69 × 5 =
  7. 7.82 × 5 =
  8. 8.72 × 5 =
  9. 9.45 × 5 =
  10. 10.22 × 5 =
  11. 11.21 × 5 =
  12. 12.82 × 5 =
  13. 13.23 × 50 =
  14. 14.60 × 5 =
  15. 15.82 × 50 =
  16. 16.76 × 50 =
  17. 17.82 × 50 =
  18. 18.40 × 50 =
  19. 19.27 × 5 =
  20. 20.26 × 50 =
  21. 21.53 × 5 =
  22. 22.39 × 5 =
  23. 23.26 × 50 =
  24. 24.78 × 5 =
  25. 25.67 × 5 =
  26. 26.18 × 5 =
  27. 27.98 × 5 =
  28. 28.74 × 5 =
  29. 29.86 × 50 =
  30. 30.39 × 5 =
  31. 31.52 × 50 =
  32. 32.47 × 5 =
  33. 33.93 × 5 =
  34. 34.40 × 5 =
  35. 35.39 × 5 =
  36. 36.60 × 50 =
  37. 37.64 × 50 =
  38. 38.40 × 5 =
  39. 39.32 × 5 =
  40. 40.80 × 5 =

Answer key

  1. 415
  2. 2200
  3. 3750
  4. 365
  5. 1700
  6. 345
  7. 410
  8. 360
  9. 225
  10. 110
  11. 105
  12. 410
  13. 1150
  14. 300
  15. 4100
  16. 3800
  17. 4100
  18. 2000
  19. 135
  20. 1300
  21. 265
  22. 195
  23. 1300
  24. 390
  25. 335
  26. 90
  27. 490
  28. 370
  29. 4300
  30. 195
  31. 2600
  32. 235
  33. 465
  34. 200
  35. 195
  36. 3000
  37. 3200
  38. 200
  39. 160
  40. 400

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