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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 717 · 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. 1.64 × 5 =
  2. 2.28 × 5 =
  3. 3.88 × 5 =
  4. 4.35 × 5 =
  5. 5.66 × 5 =
  6. 6.50 × 5 =
  7. 7.18 × 50 =
  8. 8.63 × 5 =
  9. 9.17 × 50 =
  10. 10.43 × 5 =
  11. 11.70 × 5 =
  12. 12.78 × 5 =
  13. 13.58 × 5 =
  14. 14.96 × 5 =
  15. 15.90 × 5 =
  16. 16.35 × 50 =
  17. 17.97 × 50 =
  18. 18.43 × 50 =
  19. 19.37 × 5 =
  20. 20.52 × 50 =
  21. 21.63 × 5 =
  22. 22.18 × 5 =
  23. 23.35 × 5 =
  24. 24.65 × 5 =
  25. 25.72 × 50 =
  26. 26.48 × 50 =
  27. 27.41 × 5 =
  28. 28.17 × 5 =
  29. 29.28 × 50 =
  30. 30.94 × 5 =
  31. 31.62 × 5 =
  32. 32.90 × 50 =
  33. 33.48 × 5 =
  34. 34.74 × 5 =
  35. 35.63 × 50 =
  36. 36.18 × 5 =
  37. 37.67 × 50 =
  38. 38.24 × 5 =
  39. 39.79 × 5 =
  40. 40.87 × 50 =

Answer key

  1. 320
  2. 140
  3. 440
  4. 175
  5. 330
  6. 250
  7. 900
  8. 315
  9. 850
  10. 215
  11. 350
  12. 390
  13. 290
  14. 480
  15. 450
  16. 1750
  17. 4850
  18. 2150
  19. 185
  20. 2600
  21. 315
  22. 90
  23. 175
  24. 325
  25. 3600
  26. 2400
  27. 205
  28. 85
  29. 1400
  30. 470
  31. 310
  32. 4500
  33. 240
  34. 370
  35. 3150
  36. 90
  37. 3350
  38. 120
  39. 395
  40. 4350

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