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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 298 · 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. 1.48 × 5 =
  2. 2.71 × 50 =
  3. 3.71 × 5 =
  4. 4.40 × 5 =
  5. 5.36 × 50 =
  6. 6.54 × 50 =
  7. 7.50 × 5 =
  8. 8.61 × 5 =
  9. 9.48 × 5 =
  10. 10.52 × 50 =
  11. 11.48 × 50 =
  12. 12.75 × 5 =
  13. 13.24 × 5 =
  14. 14.76 × 5 =
  15. 15.40 × 50 =
  16. 16.30 × 50 =
  17. 17.45 × 5 =
  18. 18.83 × 50 =
  19. 19.67 × 50 =
  20. 20.35 × 50 =
  21. 21.44 × 5 =
  22. 22.13 × 50 =
  23. 23.94 × 50 =
  24. 24.97 × 5 =
  25. 25.58 × 50 =
  26. 26.92 × 5 =
  27. 27.88 × 50 =
  28. 28.68 × 5 =
  29. 29.59 × 50 =
  30. 30.27 × 5 =
  31. 31.96 × 5 =
  32. 32.43 × 50 =
  33. 33.88 × 5 =
  34. 34.75 × 5 =
  35. 35.25 × 5 =
  36. 36.77 × 5 =
  37. 37.42 × 5 =
  38. 38.20 × 50 =
  39. 39.46 × 50 =
  40. 40.51 × 5 =

Answer key

  1. 240
  2. 3550
  3. 355
  4. 200
  5. 1800
  6. 2700
  7. 250
  8. 305
  9. 240
  10. 2600
  11. 2400
  12. 375
  13. 120
  14. 380
  15. 2000
  16. 1500
  17. 225
  18. 4150
  19. 3350
  20. 1750
  21. 220
  22. 650
  23. 4700
  24. 485
  25. 2900
  26. 460
  27. 4400
  28. 340
  29. 2950
  30. 135
  31. 480
  32. 2150
  33. 440
  34. 375
  35. 125
  36. 385
  37. 210
  38. 1000
  39. 2300
  40. 255

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