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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 787 · 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. 1.22 × 50 =
  2. 2.46 × 5 =
  3. 3.20 × 5 =
  4. 4.75 × 50 =
  5. 5.14 × 5 =
  6. 6.94 × 50 =
  7. 7.78 × 50 =
  8. 8.17 × 50 =
  9. 9.42 × 50 =
  10. 10.64 × 50 =
  11. 11.60 × 5 =
  12. 12.54 × 50 =
  13. 13.68 × 5 =
  14. 14.40 × 5 =
  15. 15.69 × 50 =
  16. 16.71 × 5 =
  17. 17.67 × 5 =
  18. 18.48 × 50 =
  19. 19.19 × 50 =
  20. 20.97 × 5 =
  21. 21.91 × 5 =
  22. 22.22 × 50 =
  23. 23.19 × 50 =
  24. 24.44 × 5 =
  25. 25.78 × 5 =
  26. 26.81 × 5 =
  27. 27.23 × 5 =
  28. 28.18 × 5 =
  29. 29.16 × 50 =
  30. 30.96 × 50 =
  31. 31.22 × 50 =
  32. 32.85 × 5 =
  33. 33.96 × 50 =
  34. 34.28 × 50 =
  35. 35.86 × 5 =
  36. 36.36 × 5 =
  37. 37.30 × 5 =
  38. 38.22 × 50 =
  39. 39.30 × 5 =
  40. 40.80 × 5 =

Answer key

  1. 1100
  2. 230
  3. 100
  4. 3750
  5. 70
  6. 4700
  7. 3900
  8. 850
  9. 2100
  10. 3200
  11. 300
  12. 2700
  13. 340
  14. 200
  15. 3450
  16. 355
  17. 335
  18. 2400
  19. 950
  20. 485
  21. 455
  22. 1100
  23. 950
  24. 220
  25. 390
  26. 405
  27. 115
  28. 90
  29. 800
  30. 4800
  31. 1100
  32. 425
  33. 4800
  34. 1400
  35. 430
  36. 180
  37. 150
  38. 1100
  39. 150
  40. 400

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