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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 722 · 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. 1.23 × 5 =
  2. 2.59 × 5 =
  3. 3.13 × 5 =
  4. 4.50 × 5 =
  5. 5.24 × 50 =
  6. 6.28 × 50 =
  7. 7.29 × 5 =
  8. 8.23 × 50 =
  9. 9.27 × 5 =
  10. 10.15 × 5 =
  11. 11.14 × 50 =
  12. 12.21 × 5 =
  13. 13.78 × 5 =
  14. 14.61 × 5 =
  15. 15.77 × 5 =
  16. 16.57 × 5 =
  17. 17.17 × 5 =
  18. 18.26 × 50 =
  19. 19.54 × 5 =
  20. 20.16 × 50 =
  21. 21.36 × 5 =
  22. 22.86 × 5 =
  23. 23.36 × 50 =
  24. 24.59 × 5 =
  25. 25.18 × 50 =
  26. 26.57 × 5 =
  27. 27.12 × 50 =
  28. 28.36 × 5 =
  29. 29.72 × 5 =
  30. 30.14 × 50 =
  31. 31.87 × 50 =
  32. 32.23 × 5 =
  33. 33.37 × 50 =
  34. 34.26 × 5 =
  35. 35.80 × 5 =
  36. 36.77 × 5 =
  37. 37.62 × 5 =
  38. 38.71 × 50 =
  39. 39.34 × 50 =
  40. 40.57 × 50 =

Answer key

  1. 115
  2. 295
  3. 65
  4. 250
  5. 1200
  6. 1400
  7. 145
  8. 1150
  9. 135
  10. 75
  11. 700
  12. 105
  13. 390
  14. 305
  15. 385
  16. 285
  17. 85
  18. 1300
  19. 270
  20. 800
  21. 180
  22. 430
  23. 1800
  24. 295
  25. 900
  26. 285
  27. 600
  28. 180
  29. 360
  30. 700
  31. 4350
  32. 115
  33. 1850
  34. 130
  35. 400
  36. 385
  37. 310
  38. 3550
  39. 1700
  40. 2850

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