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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 647 · 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. 1.47 × 50 =
  2. 2.34 × 50 =
  3. 3.86 × 50 =
  4. 4.36 × 50 =
  5. 5.60 × 50 =
  6. 6.32 × 5 =
  7. 7.36 × 50 =
  8. 8.56 × 5 =
  9. 9.45 × 50 =
  10. 10.64 × 5 =
  11. 11.32 × 5 =
  12. 12.34 × 50 =
  13. 13.32 × 50 =
  14. 14.91 × 5 =
  15. 15.54 × 5 =
  16. 16.82 × 50 =
  17. 17.18 × 50 =
  18. 18.39 × 50 =
  19. 19.38 × 5 =
  20. 20.65 × 5 =
  21. 21.86 × 50 =
  22. 22.21 × 5 =
  23. 23.36 × 50 =
  24. 24.48 × 50 =
  25. 25.41 × 50 =
  26. 26.18 × 5 =
  27. 27.60 × 50 =
  28. 28.70 × 50 =
  29. 29.59 × 5 =
  30. 30.69 × 5 =
  31. 31.41 × 50 =
  32. 32.29 × 5 =
  33. 33.84 × 50 =
  34. 34.29 × 50 =
  35. 35.58 × 50 =
  36. 36.84 × 50 =
  37. 37.53 × 5 =
  38. 38.80 × 5 =
  39. 39.38 × 50 =
  40. 40.35 × 5 =

Answer key

  1. 2350
  2. 1700
  3. 4300
  4. 1800
  5. 3000
  6. 160
  7. 1800
  8. 280
  9. 2250
  10. 320
  11. 160
  12. 1700
  13. 1600
  14. 455
  15. 270
  16. 4100
  17. 900
  18. 1950
  19. 190
  20. 325
  21. 4300
  22. 105
  23. 1800
  24. 2400
  25. 2050
  26. 90
  27. 3000
  28. 3500
  29. 295
  30. 345
  31. 2050
  32. 145
  33. 4200
  34. 1450
  35. 2900
  36. 4200
  37. 265
  38. 400
  39. 1900
  40. 175

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