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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 201 · 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. 1.68 × 5 =
  2. 2.34 × 50 =
  3. 3.15 × 5 =
  4. 4.86 × 5 =
  5. 5.78 × 50 =
  6. 6.78 × 5 =
  7. 7.41 × 50 =
  8. 8.25 × 50 =
  9. 9.66 × 50 =
  10. 10.67 × 50 =
  11. 11.44 × 5 =
  12. 12.34 × 50 =
  13. 13.97 × 50 =
  14. 14.75 × 5 =
  15. 15.47 × 5 =
  16. 16.89 × 50 =
  17. 17.43 × 5 =
  18. 18.44 × 5 =
  19. 19.49 × 5 =
  20. 20.42 × 5 =
  21. 21.58 × 50 =
  22. 22.28 × 5 =
  23. 23.46 × 5 =
  24. 24.92 × 5 =
  25. 25.64 × 5 =
  26. 26.81 × 5 =
  27. 27.25 × 50 =
  28. 28.57 × 5 =
  29. 29.48 × 50 =
  30. 30.80 × 5 =
  31. 31.69 × 5 =
  32. 32.68 × 50 =
  33. 33.74 × 5 =
  34. 34.38 × 5 =
  35. 35.40 × 5 =
  36. 36.14 × 5 =
  37. 37.25 × 50 =
  38. 38.53 × 5 =
  39. 39.55 × 5 =
  40. 40.81 × 5 =

Answer key

  1. 340
  2. 1700
  3. 75
  4. 430
  5. 3900
  6. 390
  7. 2050
  8. 1250
  9. 3300
  10. 3350
  11. 220
  12. 1700
  13. 4850
  14. 375
  15. 235
  16. 4450
  17. 215
  18. 220
  19. 245
  20. 210
  21. 2900
  22. 140
  23. 230
  24. 460
  25. 320
  26. 405
  27. 1250
  28. 285
  29. 2400
  30. 400
  31. 345
  32. 3400
  33. 370
  34. 190
  35. 200
  36. 70
  37. 1250
  38. 265
  39. 275
  40. 405

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