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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 122 · 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. 1.55 × 50 =
  2. 2.68 × 5 =
  3. 3.24 × 50 =
  4. 4.30 × 50 =
  5. 5.36 × 50 =
  6. 6.66 × 50 =
  7. 7.17 × 5 =
  8. 8.39 × 50 =
  9. 9.51 × 5 =
  10. 10.21 × 50 =
  11. 11.98 × 50 =
  12. 12.39 × 50 =
  13. 13.80 × 50 =
  14. 14.45 × 50 =
  15. 15.34 × 50 =
  16. 16.21 × 5 =
  17. 17.34 × 5 =
  18. 18.75 × 50 =
  19. 19.70 × 5 =
  20. 20.33 × 50 =
  21. 21.84 × 5 =
  22. 22.49 × 50 =
  23. 23.59 × 50 =
  24. 24.56 × 5 =
  25. 25.91 × 5 =
  26. 26.69 × 5 =
  27. 27.67 × 5 =
  28. 28.32 × 5 =
  29. 29.20 × 5 =
  30. 30.85 × 50 =
  31. 31.50 × 5 =
  32. 32.26 × 50 =
  33. 33.85 × 50 =
  34. 34.75 × 50 =
  35. 35.51 × 5 =
  36. 36.44 × 5 =
  37. 37.30 × 50 =
  38. 38.54 × 5 =
  39. 39.51 × 50 =
  40. 40.20 × 5 =

Answer key

  1. 2750
  2. 340
  3. 1200
  4. 1500
  5. 1800
  6. 3300
  7. 85
  8. 1950
  9. 255
  10. 1050
  11. 4900
  12. 1950
  13. 4000
  14. 2250
  15. 1700
  16. 105
  17. 170
  18. 3750
  19. 350
  20. 1650
  21. 420
  22. 2450
  23. 2950
  24. 280
  25. 455
  26. 345
  27. 335
  28. 160
  29. 100
  30. 4250
  31. 250
  32. 1300
  33. 4250
  34. 3750
  35. 255
  36. 220
  37. 1500
  38. 270
  39. 2550
  40. 100

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