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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 741 · 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. 1.35 × 50 =
  2. 2.77 × 5 =
  3. 3.89 × 5 =
  4. 4.89 × 5 =
  5. 5.44 × 5 =
  6. 6.30 × 5 =
  7. 7.58 × 5 =
  8. 8.92 × 50 =
  9. 9.59 × 50 =
  10. 10.18 × 5 =
  11. 11.66 × 50 =
  12. 12.60 × 5 =
  13. 13.31 × 5 =
  14. 14.16 × 5 =
  15. 15.78 × 50 =
  16. 16.31 × 50 =
  17. 17.61 × 5 =
  18. 18.32 × 5 =
  19. 19.94 × 5 =
  20. 20.71 × 5 =
  21. 21.69 × 50 =
  22. 22.15 × 50 =
  23. 23.59 × 5 =
  24. 24.78 × 5 =
  25. 25.56 × 50 =
  26. 26.98 × 5 =
  27. 27.59 × 50 =
  28. 28.36 × 5 =
  29. 29.18 × 5 =
  30. 30.45 × 50 =
  31. 31.76 × 5 =
  32. 32.93 × 5 =
  33. 33.33 × 50 =
  34. 34.82 × 5 =
  35. 35.50 × 50 =
  36. 36.35 × 5 =
  37. 37.87 × 5 =
  38. 38.79 × 5 =
  39. 39.84 × 50 =
  40. 40.22 × 5 =

Answer key

  1. 1750
  2. 385
  3. 445
  4. 445
  5. 220
  6. 150
  7. 290
  8. 4600
  9. 2950
  10. 90
  11. 3300
  12. 300
  13. 155
  14. 80
  15. 3900
  16. 1550
  17. 305
  18. 160
  19. 470
  20. 355
  21. 3450
  22. 750
  23. 295
  24. 390
  25. 2800
  26. 490
  27. 2950
  28. 180
  29. 90
  30. 2250
  31. 380
  32. 465
  33. 1650
  34. 410
  35. 2500
  36. 175
  37. 435
  38. 395
  39. 4200
  40. 110

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