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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 42 · 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. 1.78 × 50 =
  2. 2.90 × 50 =
  3. 3.49 × 50 =
  4. 4.57 × 5 =
  5. 5.97 × 5 =
  6. 6.23 × 5 =
  7. 7.39 × 5 =
  8. 8.90 × 5 =
  9. 9.82 × 50 =
  10. 10.83 × 5 =
  11. 11.59 × 5 =
  12. 12.44 × 5 =
  13. 13.60 × 5 =
  14. 14.31 × 5 =
  15. 15.26 × 5 =
  16. 16.58 × 5 =
  17. 17.75 × 5 =
  18. 18.32 × 5 =
  19. 19.77 × 5 =
  20. 20.41 × 5 =
  21. 21.13 × 5 =
  22. 22.41 × 5 =
  23. 23.47 × 5 =
  24. 24.19 × 50 =
  25. 25.28 × 5 =
  26. 26.23 × 5 =
  27. 27.51 × 50 =
  28. 28.98 × 50 =
  29. 29.84 × 5 =
  30. 30.41 × 5 =
  31. 31.43 × 50 =
  32. 32.14 × 50 =
  33. 33.29 × 5 =
  34. 34.86 × 50 =
  35. 35.69 × 5 =
  36. 36.32 × 50 =
  37. 37.33 × 5 =
  38. 38.42 × 5 =
  39. 39.91 × 5 =
  40. 40.60 × 5 =

Answer key

  1. 3900
  2. 4500
  3. 2450
  4. 285
  5. 485
  6. 115
  7. 195
  8. 450
  9. 4100
  10. 415
  11. 295
  12. 220
  13. 300
  14. 155
  15. 130
  16. 290
  17. 375
  18. 160
  19. 385
  20. 205
  21. 65
  22. 205
  23. 235
  24. 950
  25. 140
  26. 115
  27. 2550
  28. 4900
  29. 420
  30. 205
  31. 2150
  32. 700
  33. 145
  34. 4300
  35. 345
  36. 1600
  37. 165
  38. 210
  39. 455
  40. 300

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