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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 72 · 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. 1.53 × 5 =
  2. 2.74 × 5 =
  3. 3.36 × 50 =
  4. 4.31 × 50 =
  5. 5.54 × 5 =
  6. 6.47 × 5 =
  7. 7.50 × 50 =
  8. 8.89 × 5 =
  9. 9.30 × 50 =
  10. 10.38 × 5 =
  11. 11.61 × 50 =
  12. 12.50 × 5 =
  13. 13.78 × 5 =
  14. 14.88 × 50 =
  15. 15.26 × 50 =
  16. 16.15 × 5 =
  17. 17.62 × 5 =
  18. 18.79 × 5 =
  19. 19.45 × 5 =
  20. 20.51 × 5 =
  21. 21.62 × 50 =
  22. 22.74 × 50 =
  23. 23.22 × 50 =
  24. 24.64 × 5 =
  25. 25.61 × 50 =
  26. 26.42 × 50 =
  27. 27.88 × 5 =
  28. 28.97 × 5 =
  29. 29.53 × 50 =
  30. 30.81 × 5 =
  31. 31.58 × 5 =
  32. 32.69 × 5 =
  33. 33.31 × 50 =
  34. 34.57 × 5 =
  35. 35.93 × 50 =
  36. 36.39 × 5 =
  37. 37.96 × 5 =
  38. 38.82 × 50 =
  39. 39.24 × 50 =
  40. 40.64 × 50 =

Answer key

  1. 265
  2. 370
  3. 1800
  4. 1550
  5. 270
  6. 235
  7. 2500
  8. 445
  9. 1500
  10. 190
  11. 3050
  12. 250
  13. 390
  14. 4400
  15. 1300
  16. 75
  17. 310
  18. 395
  19. 225
  20. 255
  21. 3100
  22. 3700
  23. 1100
  24. 320
  25. 3050
  26. 2100
  27. 440
  28. 485
  29. 2650
  30. 405
  31. 290
  32. 345
  33. 1550
  34. 285
  35. 4650
  36. 195
  37. 480
  38. 4100
  39. 1200
  40. 3200

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