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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 744 · 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. 1.54 × 5 =
  2. 2.42 × 50 =
  3. 3.98 × 5 =
  4. 4.17 × 50 =
  5. 5.32 × 5 =
  6. 6.48 × 50 =
  7. 7.88 × 5 =
  8. 8.24 × 5 =
  9. 9.23 × 50 =
  10. 10.59 × 5 =
  11. 11.27 × 5 =
  12. 12.98 × 5 =
  13. 13.17 × 50 =
  14. 14.14 × 50 =
  15. 15.56 × 5 =
  16. 16.37 × 5 =
  17. 17.20 × 50 =
  18. 18.21 × 5 =
  19. 19.18 × 5 =
  20. 20.97 × 50 =
  21. 21.27 × 5 =
  22. 22.82 × 5 =
  23. 23.43 × 50 =
  24. 24.27 × 50 =
  25. 25.58 × 50 =
  26. 26.31 × 50 =
  27. 27.91 × 5 =
  28. 28.87 × 50 =
  29. 29.12 × 5 =
  30. 30.13 × 5 =
  31. 31.35 × 50 =
  32. 32.12 × 5 =
  33. 33.53 × 50 =
  34. 34.67 × 5 =
  35. 35.64 × 50 =
  36. 36.54 × 5 =
  37. 37.36 × 50 =
  38. 38.40 × 5 =
  39. 39.39 × 5 =
  40. 40.68 × 5 =

Answer key

  1. 270
  2. 2100
  3. 490
  4. 850
  5. 160
  6. 2400
  7. 440
  8. 120
  9. 1150
  10. 295
  11. 135
  12. 490
  13. 850
  14. 700
  15. 280
  16. 185
  17. 1000
  18. 105
  19. 90
  20. 4850
  21. 135
  22. 410
  23. 2150
  24. 1350
  25. 2900
  26. 1550
  27. 455
  28. 4350
  29. 60
  30. 65
  31. 1750
  32. 60
  33. 2650
  34. 335
  35. 3200
  36. 270
  37. 1800
  38. 200
  39. 195
  40. 340

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