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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 40 · 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. 1.17 × 50 =
  2. 2.92 × 50 =
  3. 3.69 × 5 =
  4. 4.36 × 5 =
  5. 5.79 × 5 =
  6. 6.96 × 5 =
  7. 7.14 × 50 =
  8. 8.92 × 50 =
  9. 9.82 × 5 =
  10. 10.29 × 5 =
  11. 11.55 × 50 =
  12. 12.89 × 5 =
  13. 13.98 × 5 =
  14. 14.39 × 50 =
  15. 15.13 × 50 =
  16. 16.49 × 50 =
  17. 17.12 × 5 =
  18. 18.74 × 50 =
  19. 19.70 × 5 =
  20. 20.46 × 50 =
  21. 21.63 × 50 =
  22. 22.29 × 5 =
  23. 23.69 × 5 =
  24. 24.34 × 5 =
  25. 25.30 × 5 =
  26. 26.56 × 5 =
  27. 27.31 × 5 =
  28. 28.12 × 50 =
  29. 29.12 × 5 =
  30. 30.65 × 50 =
  31. 31.88 × 50 =
  32. 32.45 × 50 =
  33. 33.80 × 50 =
  34. 34.73 × 5 =
  35. 35.78 × 5 =
  36. 36.30 × 50 =
  37. 37.25 × 5 =
  38. 38.17 × 5 =
  39. 39.12 × 50 =
  40. 40.53 × 50 =

Answer key

  1. 850
  2. 4600
  3. 345
  4. 180
  5. 395
  6. 480
  7. 700
  8. 4600
  9. 410
  10. 145
  11. 2750
  12. 445
  13. 490
  14. 1950
  15. 650
  16. 2450
  17. 60
  18. 3700
  19. 350
  20. 2300
  21. 3150
  22. 145
  23. 345
  24. 170
  25. 150
  26. 280
  27. 155
  28. 600
  29. 60
  30. 3250
  31. 4400
  32. 2250
  33. 4000
  34. 365
  35. 390
  36. 1500
  37. 125
  38. 85
  39. 600
  40. 2650

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