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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 738 · 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. 1.91 × 5 =
  2. 2.21 × 50 =
  3. 3.31 × 50 =
  4. 4.12 × 50 =
  5. 5.94 × 50 =
  6. 6.75 × 50 =
  7. 7.92 × 5 =
  8. 8.38 × 50 =
  9. 9.14 × 5 =
  10. 10.67 × 5 =
  11. 11.36 × 50 =
  12. 12.39 × 5 =
  13. 13.44 × 50 =
  14. 14.46 × 50 =
  15. 15.76 × 5 =
  16. 16.83 × 5 =
  17. 17.87 × 5 =
  18. 18.47 × 50 =
  19. 19.88 × 5 =
  20. 20.82 × 50 =
  21. 21.32 × 5 =
  22. 22.82 × 5 =
  23. 23.70 × 50 =
  24. 24.19 × 5 =
  25. 25.63 × 5 =
  26. 26.48 × 50 =
  27. 27.97 × 5 =
  28. 28.70 × 5 =
  29. 29.60 × 5 =
  30. 30.92 × 50 =
  31. 31.68 × 5 =
  32. 32.98 × 50 =
  33. 33.74 × 5 =
  34. 34.56 × 5 =
  35. 35.32 × 50 =
  36. 36.22 × 50 =
  37. 37.46 × 50 =
  38. 38.69 × 50 =
  39. 39.33 × 5 =
  40. 40.54 × 5 =

Answer key

  1. 455
  2. 1050
  3. 1550
  4. 600
  5. 4700
  6. 3750
  7. 460
  8. 1900
  9. 70
  10. 335
  11. 1800
  12. 195
  13. 2200
  14. 2300
  15. 380
  16. 415
  17. 435
  18. 2350
  19. 440
  20. 4100
  21. 160
  22. 410
  23. 3500
  24. 95
  25. 315
  26. 2400
  27. 485
  28. 350
  29. 300
  30. 4600
  31. 340
  32. 4900
  33. 370
  34. 280
  35. 1600
  36. 1100
  37. 2300
  38. 3450
  39. 165
  40. 270

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