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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 228 · 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. 1.75 × 5 =
  2. 2.79 × 5 =
  3. 3.57 × 5 =
  4. 4.31 × 5 =
  5. 5.64 × 5 =
  6. 6.62 × 5 =
  7. 7.63 × 50 =
  8. 8.19 × 5 =
  9. 9.52 × 50 =
  10. 10.26 × 50 =
  11. 11.22 × 50 =
  12. 12.72 × 50 =
  13. 13.37 × 5 =
  14. 14.90 × 50 =
  15. 15.56 × 5 =
  16. 16.65 × 50 =
  17. 17.72 × 5 =
  18. 18.41 × 50 =
  19. 19.19 × 5 =
  20. 20.74 × 5 =
  21. 21.74 × 5 =
  22. 22.90 × 5 =
  23. 23.30 × 50 =
  24. 24.18 × 5 =
  25. 25.80 × 5 =
  26. 26.22 × 5 =
  27. 27.31 × 5 =
  28. 28.50 × 5 =
  29. 29.96 × 50 =
  30. 30.96 × 5 =
  31. 31.36 × 5 =
  32. 32.91 × 5 =
  33. 33.25 × 50 =
  34. 34.17 × 5 =
  35. 35.17 × 5 =
  36. 36.98 × 50 =
  37. 37.91 × 50 =
  38. 38.14 × 50 =
  39. 39.31 × 50 =
  40. 40.74 × 50 =

Answer key

  1. 375
  2. 395
  3. 285
  4. 155
  5. 320
  6. 310
  7. 3150
  8. 95
  9. 2600
  10. 1300
  11. 1100
  12. 3600
  13. 185
  14. 4500
  15. 280
  16. 3250
  17. 360
  18. 2050
  19. 95
  20. 370
  21. 370
  22. 450
  23. 1500
  24. 90
  25. 400
  26. 110
  27. 155
  28. 250
  29. 4800
  30. 480
  31. 180
  32. 455
  33. 1250
  34. 85
  35. 85
  36. 4900
  37. 4550
  38. 700
  39. 1550
  40. 3700

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