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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 457 · 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. 1.21 × 5 =
  2. 2.34 × 5 =
  3. 3.16 × 50 =
  4. 4.89 × 50 =
  5. 5.25 × 5 =
  6. 6.34 × 5 =
  7. 7.96 × 50 =
  8. 8.31 × 50 =
  9. 9.28 × 5 =
  10. 10.15 × 5 =
  11. 11.24 × 5 =
  12. 12.36 × 50 =
  13. 13.58 × 5 =
  14. 14.38 × 5 =
  15. 15.38 × 50 =
  16. 16.96 × 50 =
  17. 17.84 × 5 =
  18. 18.80 × 50 =
  19. 19.12 × 5 =
  20. 20.26 × 5 =
  21. 21.55 × 5 =
  22. 22.44 × 5 =
  23. 23.31 × 50 =
  24. 24.63 × 5 =
  25. 25.48 × 5 =
  26. 26.98 × 5 =
  27. 27.98 × 5 =
  28. 28.58 × 50 =
  29. 29.30 × 50 =
  30. 30.34 × 5 =
  31. 31.50 × 5 =
  32. 32.16 × 5 =
  33. 33.17 × 50 =
  34. 34.57 × 5 =
  35. 35.46 × 5 =
  36. 36.18 × 5 =
  37. 37.22 × 50 =
  38. 38.15 × 5 =
  39. 39.60 × 50 =
  40. 40.93 × 5 =

Answer key

  1. 105
  2. 170
  3. 800
  4. 4450
  5. 125
  6. 170
  7. 4800
  8. 1550
  9. 140
  10. 75
  11. 120
  12. 1800
  13. 290
  14. 190
  15. 1900
  16. 4800
  17. 420
  18. 4000
  19. 60
  20. 130
  21. 275
  22. 220
  23. 1550
  24. 315
  25. 240
  26. 490
  27. 490
  28. 2900
  29. 1500
  30. 170
  31. 250
  32. 80
  33. 850
  34. 285
  35. 230
  36. 90
  37. 1100
  38. 75
  39. 3000
  40. 465

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