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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 418 · 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. 1.79 × 5 =
  2. 2.18 × 50 =
  3. 3.72 × 5 =
  4. 4.54 × 5 =
  5. 5.63 × 5 =
  6. 6.23 × 5 =
  7. 7.29 × 50 =
  8. 8.24 × 5 =
  9. 9.88 × 50 =
  10. 10.68 × 50 =
  11. 11.14 × 50 =
  12. 12.97 × 5 =
  13. 13.59 × 50 =
  14. 14.90 × 5 =
  15. 15.97 × 5 =
  16. 16.73 × 5 =
  17. 17.13 × 50 =
  18. 18.58 × 5 =
  19. 19.21 × 50 =
  20. 20.46 × 5 =
  21. 21.42 × 50 =
  22. 22.13 × 5 =
  23. 23.37 × 5 =
  24. 24.25 × 5 =
  25. 25.79 × 5 =
  26. 26.42 × 5 =
  27. 27.41 × 5 =
  28. 28.33 × 5 =
  29. 29.55 × 5 =
  30. 30.27 × 50 =
  31. 31.30 × 5 =
  32. 32.17 × 50 =
  33. 33.30 × 5 =
  34. 34.84 × 5 =
  35. 35.63 × 50 =
  36. 36.85 × 5 =
  37. 37.66 × 5 =
  38. 38.25 × 50 =
  39. 39.64 × 50 =
  40. 40.52 × 5 =

Answer key

  1. 395
  2. 900
  3. 360
  4. 270
  5. 315
  6. 115
  7. 1450
  8. 120
  9. 4400
  10. 3400
  11. 700
  12. 485
  13. 2950
  14. 450
  15. 485
  16. 365
  17. 650
  18. 290
  19. 1050
  20. 230
  21. 2100
  22. 65
  23. 185
  24. 125
  25. 395
  26. 210
  27. 205
  28. 165
  29. 275
  30. 1350
  31. 150
  32. 850
  33. 150
  34. 420
  35. 3150
  36. 425
  37. 330
  38. 1250
  39. 3200
  40. 260

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