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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 3 · 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. 1.15 × 50 =
  2. 2.48 × 5 =
  3. 3.89 × 5 =
  4. 4.16 × 50 =
  5. 5.83 × 50 =
  6. 6.40 × 5 =
  7. 7.95 × 50 =
  8. 8.19 × 50 =
  9. 9.88 × 5 =
  10. 10.66 × 5 =
  11. 11.68 × 5 =
  12. 12.34 × 5 =
  13. 13.67 × 50 =
  14. 14.88 × 50 =
  15. 15.36 × 5 =
  16. 16.17 × 5 =
  17. 17.75 × 5 =
  18. 18.54 × 5 =
  19. 19.30 × 50 =
  20. 20.83 × 5 =
  21. 21.19 × 50 =
  22. 22.31 × 5 =
  23. 23.91 × 5 =
  24. 24.41 × 5 =
  25. 25.74 × 50 =
  26. 26.74 × 50 =
  27. 27.91 × 5 =
  28. 28.58 × 50 =
  29. 29.36 × 5 =
  30. 30.59 × 50 =
  31. 31.17 × 5 =
  32. 32.52 × 5 =
  33. 33.26 × 5 =
  34. 34.54 × 50 =
  35. 35.51 × 50 =
  36. 36.98 × 5 =
  37. 37.27 × 5 =
  38. 38.57 × 5 =
  39. 39.37 × 5 =
  40. 40.77 × 5 =

Answer key

  1. 750
  2. 240
  3. 445
  4. 800
  5. 4150
  6. 200
  7. 4750
  8. 950
  9. 440
  10. 330
  11. 340
  12. 170
  13. 3350
  14. 4400
  15. 180
  16. 85
  17. 375
  18. 270
  19. 1500
  20. 415
  21. 950
  22. 155
  23. 455
  24. 205
  25. 3700
  26. 3700
  27. 455
  28. 2900
  29. 180
  30. 2950
  31. 85
  32. 260
  33. 130
  34. 2700
  35. 2550
  36. 490
  37. 135
  38. 285
  39. 185
  40. 385

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