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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 446 · 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. 1.95 × 50 =
  2. 2.54 × 5 =
  3. 3.21 × 5 =
  4. 4.17 × 5 =
  5. 5.51 × 50 =
  6. 6.71 × 50 =
  7. 7.63 × 5 =
  8. 8.45 × 5 =
  9. 9.71 × 5 =
  10. 10.41 × 50 =
  11. 11.30 × 50 =
  12. 12.58 × 5 =
  13. 13.80 × 5 =
  14. 14.78 × 5 =
  15. 15.78 × 5 =
  16. 16.56 × 50 =
  17. 17.69 × 5 =
  18. 18.32 × 50 =
  19. 19.64 × 50 =
  20. 20.31 × 5 =
  21. 21.51 × 5 =
  22. 22.37 × 5 =
  23. 23.32 × 50 =
  24. 24.27 × 5 =
  25. 25.88 × 5 =
  26. 26.71 × 5 =
  27. 27.18 × 50 =
  28. 28.25 × 5 =
  29. 29.66 × 5 =
  30. 30.28 × 50 =
  31. 31.34 × 5 =
  32. 32.63 × 50 =
  33. 33.52 × 5 =
  34. 34.74 × 5 =
  35. 35.33 × 5 =
  36. 36.77 × 50 =
  37. 37.27 × 50 =
  38. 38.42 × 5 =
  39. 39.49 × 50 =
  40. 40.12 × 50 =

Answer key

  1. 4750
  2. 270
  3. 105
  4. 85
  5. 2550
  6. 3550
  7. 315
  8. 225
  9. 355
  10. 2050
  11. 1500
  12. 290
  13. 400
  14. 390
  15. 390
  16. 2800
  17. 345
  18. 1600
  19. 3200
  20. 155
  21. 255
  22. 185
  23. 1600
  24. 135
  25. 440
  26. 355
  27. 900
  28. 125
  29. 330
  30. 1400
  31. 170
  32. 3150
  33. 260
  34. 370
  35. 165
  36. 3850
  37. 1350
  38. 210
  39. 2450
  40. 600

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