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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 591 · 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. 1.90 × 50 =
  2. 2.29 × 5 =
  3. 3.54 × 50 =
  4. 4.83 × 5 =
  5. 5.76 × 5 =
  6. 6.55 × 5 =
  7. 7.25 × 5 =
  8. 8.49 × 50 =
  9. 9.31 × 5 =
  10. 10.24 × 5 =
  11. 11.37 × 5 =
  12. 12.60 × 50 =
  13. 13.25 × 5 =
  14. 14.75 × 5 =
  15. 15.49 × 5 =
  16. 16.88 × 5 =
  17. 17.15 × 5 =
  18. 18.54 × 5 =
  19. 19.60 × 50 =
  20. 20.26 × 50 =
  21. 21.14 × 5 =
  22. 22.81 × 5 =
  23. 23.65 × 5 =
  24. 24.26 × 50 =
  25. 25.76 × 5 =
  26. 26.21 × 5 =
  27. 27.80 × 5 =
  28. 28.44 × 5 =
  29. 29.67 × 50 =
  30. 30.25 × 50 =
  31. 31.75 × 50 =
  32. 32.80 × 5 =
  33. 33.15 × 50 =
  34. 34.82 × 5 =
  35. 35.31 × 50 =
  36. 36.22 × 5 =
  37. 37.53 × 50 =
  38. 38.15 × 5 =
  39. 39.50 × 5 =
  40. 40.50 × 5 =

Answer key

  1. 4500
  2. 145
  3. 2700
  4. 415
  5. 380
  6. 275
  7. 125
  8. 2450
  9. 155
  10. 120
  11. 185
  12. 3000
  13. 125
  14. 375
  15. 245
  16. 440
  17. 75
  18. 270
  19. 3000
  20. 1300
  21. 70
  22. 405
  23. 325
  24. 1300
  25. 380
  26. 105
  27. 400
  28. 220
  29. 3350
  30. 1250
  31. 3750
  32. 400
  33. 750
  34. 410
  35. 1550
  36. 110
  37. 2650
  38. 75
  39. 250
  40. 250

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