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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 581 · 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. 1.46 × 5 =
  2. 2.68 × 50 =
  3. 3.34 × 5 =
  4. 4.21 × 5 =
  5. 5.40 × 5 =
  6. 6.15 × 5 =
  7. 7.33 × 50 =
  8. 8.67 × 5 =
  9. 9.76 × 50 =
  10. 10.12 × 50 =
  11. 11.67 × 50 =
  12. 12.67 × 50 =
  13. 13.19 × 50 =
  14. 14.12 × 50 =
  15. 15.52 × 50 =
  16. 16.82 × 5 =
  17. 17.37 × 50 =
  18. 18.83 × 50 =
  19. 19.90 × 50 =
  20. 20.17 × 5 =
  21. 21.23 × 5 =
  22. 22.79 × 50 =
  23. 23.30 × 50 =
  24. 24.32 × 5 =
  25. 25.37 × 5 =
  26. 26.22 × 5 =
  27. 27.25 × 50 =
  28. 28.23 × 50 =
  29. 29.39 × 5 =
  30. 30.61 × 5 =
  31. 31.20 × 50 =
  32. 32.19 × 50 =
  33. 33.79 × 5 =
  34. 34.61 × 5 =
  35. 35.29 × 50 =
  36. 36.36 × 50 =
  37. 37.32 × 50 =
  38. 38.80 × 50 =
  39. 39.27 × 5 =
  40. 40.58 × 50 =

Answer key

  1. 230
  2. 3400
  3. 170
  4. 105
  5. 200
  6. 75
  7. 1650
  8. 335
  9. 3800
  10. 600
  11. 3350
  12. 3350
  13. 950
  14. 600
  15. 2600
  16. 410
  17. 1850
  18. 4150
  19. 4500
  20. 85
  21. 115
  22. 3950
  23. 1500
  24. 160
  25. 185
  26. 110
  27. 1250
  28. 1150
  29. 195
  30. 305
  31. 1000
  32. 950
  33. 395
  34. 305
  35. 1450
  36. 1800
  37. 1600
  38. 4000
  39. 135
  40. 2900

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