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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 421 · 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. 1.73 × 5 =
  2. 2.67 × 5 =
  3. 3.73 × 5 =
  4. 4.31 × 5 =
  5. 5.36 × 50 =
  6. 6.35 × 5 =
  7. 7.36 × 50 =
  8. 8.61 × 50 =
  9. 9.73 × 5 =
  10. 10.15 × 50 =
  11. 11.31 × 50 =
  12. 12.13 × 5 =
  13. 13.12 × 50 =
  14. 14.46 × 5 =
  15. 15.25 × 5 =
  16. 16.17 × 5 =
  17. 17.24 × 50 =
  18. 18.27 × 5 =
  19. 19.85 × 5 =
  20. 20.41 × 5 =
  21. 21.21 × 50 =
  22. 22.50 × 5 =
  23. 23.72 × 5 =
  24. 24.64 × 50 =
  25. 25.32 × 50 =
  26. 26.84 × 5 =
  27. 27.96 × 50 =
  28. 28.38 × 50 =
  29. 29.13 × 5 =
  30. 30.76 × 5 =
  31. 31.37 × 5 =
  32. 32.18 × 5 =
  33. 33.90 × 5 =
  34. 34.20 × 5 =
  35. 35.66 × 50 =
  36. 36.55 × 50 =
  37. 37.69 × 5 =
  38. 38.70 × 5 =
  39. 39.35 × 5 =
  40. 40.54 × 5 =

Answer key

  1. 365
  2. 335
  3. 365
  4. 155
  5. 1800
  6. 175
  7. 1800
  8. 3050
  9. 365
  10. 750
  11. 1550
  12. 65
  13. 600
  14. 230
  15. 125
  16. 85
  17. 1200
  18. 135
  19. 425
  20. 205
  21. 1050
  22. 250
  23. 360
  24. 3200
  25. 1600
  26. 420
  27. 4800
  28. 1900
  29. 65
  30. 380
  31. 185
  32. 90
  33. 450
  34. 100
  35. 3300
  36. 2750
  37. 345
  38. 350
  39. 175
  40. 270

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