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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 213 · 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. 1.77 × 5 =
  2. 2.15 × 5 =
  3. 3.59 × 50 =
  4. 4.61 × 5 =
  5. 5.73 × 5 =
  6. 6.75 × 5 =
  7. 7.48 × 50 =
  8. 8.40 × 50 =
  9. 9.69 × 50 =
  10. 10.83 × 50 =
  11. 11.31 × 50 =
  12. 12.14 × 5 =
  13. 13.36 × 5 =
  14. 14.71 × 50 =
  15. 15.64 × 50 =
  16. 16.47 × 5 =
  17. 17.47 × 50 =
  18. 18.30 × 5 =
  19. 19.16 × 5 =
  20. 20.50 × 5 =
  21. 21.37 × 50 =
  22. 22.22 × 50 =
  23. 23.27 × 5 =
  24. 24.19 × 5 =
  25. 25.27 × 50 =
  26. 26.63 × 5 =
  27. 27.74 × 5 =
  28. 28.38 × 5 =
  29. 29.21 × 5 =
  30. 30.19 × 50 =
  31. 31.92 × 50 =
  32. 32.80 × 5 =
  33. 33.27 × 50 =
  34. 34.18 × 5 =
  35. 35.75 × 5 =
  36. 36.63 × 5 =
  37. 37.15 × 5 =
  38. 38.80 × 5 =
  39. 39.82 × 5 =
  40. 40.90 × 50 =

Answer key

  1. 385
  2. 75
  3. 2950
  4. 305
  5. 365
  6. 375
  7. 2400
  8. 2000
  9. 3450
  10. 4150
  11. 1550
  12. 70
  13. 180
  14. 3550
  15. 3200
  16. 235
  17. 2350
  18. 150
  19. 80
  20. 250
  21. 1850
  22. 1100
  23. 135
  24. 95
  25. 1350
  26. 315
  27. 370
  28. 190
  29. 105
  30. 950
  31. 4600
  32. 400
  33. 1350
  34. 90
  35. 375
  36. 315
  37. 75
  38. 400
  39. 410
  40. 4500

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