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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 107 · 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. 1.18 × 50 =
  2. 2.34 × 5 =
  3. 3.87 × 50 =
  4. 4.37 × 5 =
  5. 5.16 × 5 =
  6. 6.37 × 50 =
  7. 7.77 × 5 =
  8. 8.12 × 5 =
  9. 9.21 × 50 =
  10. 10.78 × 50 =
  11. 11.79 × 50 =
  12. 12.49 × 5 =
  13. 13.61 × 50 =
  14. 14.51 × 50 =
  15. 15.28 × 5 =
  16. 16.28 × 50 =
  17. 17.44 × 50 =
  18. 18.59 × 50 =
  19. 19.55 × 50 =
  20. 20.71 × 50 =
  21. 21.29 × 5 =
  22. 22.13 × 50 =
  23. 23.48 × 5 =
  24. 24.42 × 50 =
  25. 25.55 × 50 =
  26. 26.30 × 5 =
  27. 27.87 × 50 =
  28. 28.67 × 5 =
  29. 29.45 × 50 =
  30. 30.81 × 50 =
  31. 31.82 × 5 =
  32. 32.75 × 50 =
  33. 33.64 × 5 =
  34. 34.34 × 50 =
  35. 35.41 × 5 =
  36. 36.59 × 50 =
  37. 37.23 × 5 =
  38. 38.22 × 5 =
  39. 39.18 × 5 =
  40. 40.46 × 5 =

Answer key

  1. 900
  2. 170
  3. 4350
  4. 185
  5. 80
  6. 1850
  7. 385
  8. 60
  9. 1050
  10. 3900
  11. 3950
  12. 245
  13. 3050
  14. 2550
  15. 140
  16. 1400
  17. 2200
  18. 2950
  19. 2750
  20. 3550
  21. 145
  22. 650
  23. 240
  24. 2100
  25. 2750
  26. 150
  27. 4350
  28. 335
  29. 2250
  30. 4050
  31. 410
  32. 3750
  33. 320
  34. 1700
  35. 205
  36. 2950
  37. 115
  38. 110
  39. 90
  40. 230

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