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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 712 · 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. 2.35 × 50 =
  3. 3.54 × 5 =
  4. 4.21 × 50 =
  5. 5.27 × 50 =
  6. 6.88 × 5 =
  7. 7.26 × 5 =
  8. 8.34 × 50 =
  9. 9.76 × 5 =
  10. 10.45 × 5 =
  11. 11.77 × 5 =
  12. 12.56 × 5 =
  13. 13.67 × 5 =
  14. 14.50 × 5 =
  15. 15.72 × 50 =
  16. 16.82 × 5 =
  17. 17.19 × 50 =
  18. 18.16 × 50 =
  19. 19.40 × 50 =
  20. 20.56 × 5 =
  21. 21.28 × 50 =
  22. 22.90 × 5 =
  23. 23.95 × 5 =
  24. 24.44 × 50 =
  25. 25.56 × 5 =
  26. 26.66 × 5 =
  27. 27.15 × 5 =
  28. 28.42 × 5 =
  29. 29.17 × 50 =
  30. 30.82 × 5 =
  31. 31.23 × 5 =
  32. 32.52 × 5 =
  33. 33.12 × 5 =
  34. 34.14 × 50 =
  35. 35.12 × 50 =
  36. 36.30 × 5 =
  37. 37.71 × 50 =
  38. 38.87 × 50 =
  39. 39.47 × 5 =
  40. 40.23 × 5 =

Answer key

  1. 2750
  2. 1750
  3. 270
  4. 1050
  5. 1350
  6. 440
  7. 130
  8. 1700
  9. 380
  10. 225
  11. 385
  12. 280
  13. 335
  14. 250
  15. 3600
  16. 410
  17. 950
  18. 800
  19. 2000
  20. 280
  21. 1400
  22. 450
  23. 475
  24. 2200
  25. 280
  26. 330
  27. 75
  28. 210
  29. 850
  30. 410
  31. 115
  32. 260
  33. 60
  34. 700
  35. 600
  36. 150
  37. 3550
  38. 4350
  39. 235
  40. 115

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