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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 792 · 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. 1.66 × 50 =
  2. 2.38 × 5 =
  3. 3.52 × 5 =
  4. 4.37 × 50 =
  5. 5.30 × 5 =
  6. 6.56 × 5 =
  7. 7.30 × 50 =
  8. 8.27 × 5 =
  9. 9.21 × 5 =
  10. 10.51 × 5 =
  11. 11.34 × 50 =
  12. 12.95 × 50 =
  13. 13.92 × 50 =
  14. 14.81 × 50 =
  15. 15.40 × 5 =
  16. 16.68 × 5 =
  17. 17.86 × 5 =
  18. 18.67 × 50 =
  19. 19.90 × 50 =
  20. 20.69 × 5 =
  21. 21.38 × 50 =
  22. 22.32 × 50 =
  23. 23.33 × 5 =
  24. 24.55 × 5 =
  25. 25.44 × 5 =
  26. 26.15 × 50 =
  27. 27.52 × 50 =
  28. 28.81 × 5 =
  29. 29.20 × 5 =
  30. 30.88 × 50 =
  31. 31.52 × 5 =
  32. 32.29 × 5 =
  33. 33.31 × 5 =
  34. 34.86 × 50 =
  35. 35.12 × 5 =
  36. 36.58 × 50 =
  37. 37.28 × 5 =
  38. 38.85 × 50 =
  39. 39.41 × 5 =
  40. 40.43 × 50 =

Answer key

  1. 3300
  2. 190
  3. 260
  4. 1850
  5. 150
  6. 280
  7. 1500
  8. 135
  9. 105
  10. 255
  11. 1700
  12. 4750
  13. 4600
  14. 4050
  15. 200
  16. 340
  17. 430
  18. 3350
  19. 4500
  20. 345
  21. 1900
  22. 1600
  23. 165
  24. 275
  25. 220
  26. 750
  27. 2600
  28. 405
  29. 100
  30. 4400
  31. 260
  32. 145
  33. 155
  34. 4300
  35. 60
  36. 2900
  37. 140
  38. 4250
  39. 205
  40. 2150

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