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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 150 · 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. 1.91 × 5 =
  2. 2.65 × 5 =
  3. 3.93 × 5 =
  4. 4.37 × 5 =
  5. 5.74 × 50 =
  6. 6.25 × 5 =
  7. 7.68 × 50 =
  8. 8.64 × 5 =
  9. 9.84 × 50 =
  10. 10.54 × 5 =
  11. 11.73 × 50 =
  12. 12.81 × 5 =
  13. 13.79 × 5 =
  14. 14.22 × 50 =
  15. 15.89 × 50 =
  16. 16.22 × 50 =
  17. 17.94 × 50 =
  18. 18.26 × 50 =
  19. 19.28 × 5 =
  20. 20.32 × 5 =
  21. 21.17 × 50 =
  22. 22.95 × 5 =
  23. 23.68 × 5 =
  24. 24.79 × 50 =
  25. 25.74 × 50 =
  26. 26.23 × 50 =
  27. 27.46 × 50 =
  28. 28.30 × 50 =
  29. 29.60 × 50 =
  30. 30.65 × 5 =
  31. 31.35 × 5 =
  32. 32.48 × 5 =
  33. 33.22 × 50 =
  34. 34.59 × 5 =
  35. 35.91 × 5 =
  36. 36.79 × 5 =
  37. 37.95 × 5 =
  38. 38.30 × 50 =
  39. 39.90 × 50 =
  40. 40.38 × 5 =

Answer key

  1. 455
  2. 325
  3. 465
  4. 185
  5. 3700
  6. 125
  7. 3400
  8. 320
  9. 4200
  10. 270
  11. 3650
  12. 405
  13. 395
  14. 1100
  15. 4450
  16. 1100
  17. 4700
  18. 1300
  19. 140
  20. 160
  21. 850
  22. 475
  23. 340
  24. 3950
  25. 3700
  26. 1150
  27. 2300
  28. 1500
  29. 3000
  30. 325
  31. 175
  32. 240
  33. 1100
  34. 295
  35. 455
  36. 395
  37. 475
  38. 1500
  39. 4500
  40. 190

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