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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 718 · 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. 1.64 × 50 =
  2. 2.26 × 5 =
  3. 3.29 × 5 =
  4. 4.14 × 50 =
  5. 5.68 × 50 =
  6. 6.31 × 50 =
  7. 7.17 × 5 =
  8. 8.18 × 5 =
  9. 9.14 × 5 =
  10. 10.82 × 50 =
  11. 11.34 × 5 =
  12. 12.55 × 5 =
  13. 13.82 × 50 =
  14. 14.60 × 5 =
  15. 15.14 × 50 =
  16. 16.22 × 50 =
  17. 17.89 × 50 =
  18. 18.65 × 5 =
  19. 19.90 × 5 =
  20. 20.46 × 50 =
  21. 21.84 × 50 =
  22. 22.51 × 5 =
  23. 23.54 × 5 =
  24. 24.86 × 50 =
  25. 25.15 × 5 =
  26. 26.32 × 5 =
  27. 27.64 × 50 =
  28. 28.35 × 50 =
  29. 29.96 × 50 =
  30. 30.58 × 50 =
  31. 31.79 × 50 =
  32. 32.84 × 50 =
  33. 33.98 × 5 =
  34. 34.50 × 5 =
  35. 35.35 × 50 =
  36. 36.30 × 5 =
  37. 37.95 × 50 =
  38. 38.94 × 50 =
  39. 39.17 × 50 =
  40. 40.83 × 5 =

Answer key

  1. 3200
  2. 130
  3. 145
  4. 700
  5. 3400
  6. 1550
  7. 85
  8. 90
  9. 70
  10. 4100
  11. 170
  12. 275
  13. 4100
  14. 300
  15. 700
  16. 1100
  17. 4450
  18. 325
  19. 450
  20. 2300
  21. 4200
  22. 255
  23. 270
  24. 4300
  25. 75
  26. 160
  27. 3200
  28. 1750
  29. 4800
  30. 2900
  31. 3950
  32. 4200
  33. 490
  34. 250
  35. 1750
  36. 150
  37. 4750
  38. 4700
  39. 850
  40. 415

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