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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 311 · 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. 1.72 × 50 =
  2. 2.86 × 50 =
  3. 3.17 × 50 =
  4. 4.69 × 50 =
  5. 5.17 × 50 =
  6. 6.24 × 5 =
  7. 7.27 × 5 =
  8. 8.29 × 5 =
  9. 9.47 × 50 =
  10. 10.71 × 5 =
  11. 11.39 × 5 =
  12. 12.17 × 50 =
  13. 13.78 × 50 =
  14. 14.60 × 5 =
  15. 15.39 × 5 =
  16. 16.69 × 5 =
  17. 17.56 × 50 =
  18. 18.14 × 50 =
  19. 19.19 × 5 =
  20. 20.76 × 50 =
  21. 21.33 × 5 =
  22. 22.38 × 50 =
  23. 23.78 × 50 =
  24. 24.54 × 5 =
  25. 25.69 × 50 =
  26. 26.23 × 5 =
  27. 27.46 × 50 =
  28. 28.96 × 5 =
  29. 29.85 × 50 =
  30. 30.18 × 5 =
  31. 31.18 × 50 =
  32. 32.34 × 50 =
  33. 33.26 × 5 =
  34. 34.52 × 5 =
  35. 35.52 × 50 =
  36. 36.31 × 50 =
  37. 37.34 × 50 =
  38. 38.12 × 50 =
  39. 39.49 × 50 =
  40. 40.53 × 5 =

Answer key

  1. 3600
  2. 4300
  3. 850
  4. 3450
  5. 850
  6. 120
  7. 135
  8. 145
  9. 2350
  10. 355
  11. 195
  12. 850
  13. 3900
  14. 300
  15. 195
  16. 345
  17. 2800
  18. 700
  19. 95
  20. 3800
  21. 165
  22. 1900
  23. 3900
  24. 270
  25. 3450
  26. 115
  27. 2300
  28. 480
  29. 4250
  30. 90
  31. 900
  32. 1700
  33. 130
  34. 260
  35. 2600
  36. 1550
  37. 1700
  38. 600
  39. 2450
  40. 265

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