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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 740 · 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. 1.23 × 50 =
  2. 2.38 × 5 =
  3. 3.78 × 5 =
  4. 4.17 × 50 =
  5. 5.14 × 5 =
  6. 6.34 × 50 =
  7. 7.27 × 50 =
  8. 8.21 × 50 =
  9. 9.49 × 50 =
  10. 10.96 × 5 =
  11. 11.21 × 5 =
  12. 12.33 × 50 =
  13. 13.74 × 5 =
  14. 14.31 × 5 =
  15. 15.81 × 50 =
  16. 16.31 × 50 =
  17. 17.28 × 50 =
  18. 18.95 × 5 =
  19. 19.15 × 5 =
  20. 20.64 × 50 =
  21. 21.48 × 50 =
  22. 22.55 × 50 =
  23. 23.66 × 5 =
  24. 24.41 × 5 =
  25. 25.95 × 5 =
  26. 26.47 × 50 =
  27. 27.14 × 5 =
  28. 28.25 × 50 =
  29. 29.13 × 5 =
  30. 30.79 × 5 =
  31. 31.78 × 50 =
  32. 32.15 × 5 =
  33. 33.73 × 50 =
  34. 34.75 × 5 =
  35. 35.66 × 50 =
  36. 36.35 × 5 =
  37. 37.49 × 50 =
  38. 38.64 × 5 =
  39. 39.27 × 5 =
  40. 40.22 × 50 =

Answer key

  1. 1150
  2. 190
  3. 390
  4. 850
  5. 70
  6. 1700
  7. 1350
  8. 1050
  9. 2450
  10. 480
  11. 105
  12. 1650
  13. 370
  14. 155
  15. 4050
  16. 1550
  17. 1400
  18. 475
  19. 75
  20. 3200
  21. 2400
  22. 2750
  23. 330
  24. 205
  25. 475
  26. 2350
  27. 70
  28. 1250
  29. 65
  30. 395
  31. 3900
  32. 75
  33. 3650
  34. 375
  35. 3300
  36. 175
  37. 2450
  38. 320
  39. 135
  40. 1100

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