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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 61 · 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. 1.80 × 5 =
  2. 2.12 × 50 =
  3. 3.83 × 50 =
  4. 4.77 × 5 =
  5. 5.31 × 5 =
  6. 6.71 × 50 =
  7. 7.70 × 5 =
  8. 8.37 × 5 =
  9. 9.31 × 50 =
  10. 10.56 × 5 =
  11. 11.84 × 5 =
  12. 12.23 × 5 =
  13. 13.42 × 50 =
  14. 14.67 × 5 =
  15. 15.65 × 5 =
  16. 16.87 × 50 =
  17. 17.38 × 50 =
  18. 18.53 × 50 =
  19. 19.67 × 5 =
  20. 20.60 × 5 =
  21. 21.69 × 50 =
  22. 22.29 × 5 =
  23. 23.55 × 50 =
  24. 24.19 × 50 =
  25. 25.33 × 5 =
  26. 26.43 × 5 =
  27. 27.42 × 50 =
  28. 28.17 × 5 =
  29. 29.16 × 5 =
  30. 30.44 × 50 =
  31. 31.21 × 5 =
  32. 32.77 × 5 =
  33. 33.49 × 50 =
  34. 34.46 × 50 =
  35. 35.48 × 50 =
  36. 36.57 × 5 =
  37. 37.39 × 50 =
  38. 38.14 × 5 =
  39. 39.79 × 5 =
  40. 40.47 × 50 =

Answer key

  1. 400
  2. 600
  3. 4150
  4. 385
  5. 155
  6. 3550
  7. 350
  8. 185
  9. 1550
  10. 280
  11. 420
  12. 115
  13. 2100
  14. 335
  15. 325
  16. 4350
  17. 1900
  18. 2650
  19. 335
  20. 300
  21. 3450
  22. 145
  23. 2750
  24. 950
  25. 165
  26. 215
  27. 2100
  28. 85
  29. 80
  30. 2200
  31. 105
  32. 385
  33. 2450
  34. 2300
  35. 2400
  36. 285
  37. 1950
  38. 70
  39. 395
  40. 2350

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