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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 778 · 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. 1.80 × 5 =
  2. 2.39 × 5 =
  3. 3.30 × 50 =
  4. 4.90 × 5 =
  5. 5.82 × 50 =
  6. 6.47 × 50 =
  7. 7.22 × 5 =
  8. 8.51 × 5 =
  9. 9.32 × 5 =
  10. 10.30 × 5 =
  11. 11.51 × 5 =
  12. 12.55 × 5 =
  13. 13.50 × 5 =
  14. 14.31 × 5 =
  15. 15.31 × 5 =
  16. 16.14 × 5 =
  17. 17.50 × 50 =
  18. 18.54 × 5 =
  19. 19.33 × 50 =
  20. 20.70 × 5 =
  21. 21.47 × 50 =
  22. 22.15 × 50 =
  23. 23.22 × 5 =
  24. 24.12 × 5 =
  25. 25.84 × 5 =
  26. 26.32 × 5 =
  27. 27.79 × 5 =
  28. 28.37 × 5 =
  29. 29.65 × 50 =
  30. 30.48 × 5 =
  31. 31.56 × 50 =
  32. 32.76 × 5 =
  33. 33.98 × 5 =
  34. 34.80 × 5 =
  35. 35.85 × 50 =
  36. 36.73 × 5 =
  37. 37.38 × 5 =
  38. 38.22 × 50 =
  39. 39.65 × 50 =
  40. 40.88 × 50 =

Answer key

  1. 400
  2. 195
  3. 1500
  4. 450
  5. 4100
  6. 2350
  7. 110
  8. 255
  9. 160
  10. 150
  11. 255
  12. 275
  13. 250
  14. 155
  15. 155
  16. 70
  17. 2500
  18. 270
  19. 1650
  20. 350
  21. 2350
  22. 750
  23. 110
  24. 60
  25. 420
  26. 160
  27. 395
  28. 185
  29. 3250
  30. 240
  31. 2800
  32. 380
  33. 490
  34. 400
  35. 4250
  36. 365
  37. 190
  38. 1100
  39. 3250
  40. 4400

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