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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 454 · 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. 1.51 × 50 =
  2. 2.92 × 50 =
  3. 3.23 × 50 =
  4. 4.24 × 50 =
  5. 5.21 × 5 =
  6. 6.36 × 50 =
  7. 7.19 × 5 =
  8. 8.33 × 50 =
  9. 9.71 × 5 =
  10. 10.57 × 5 =
  11. 11.23 × 50 =
  12. 12.23 × 5 =
  13. 13.29 × 5 =
  14. 14.13 × 5 =
  15. 15.48 × 50 =
  16. 16.74 × 5 =
  17. 17.18 × 5 =
  18. 18.34 × 5 =
  19. 19.88 × 50 =
  20. 20.30 × 5 =
  21. 21.21 × 5 =
  22. 22.90 × 5 =
  23. 23.13 × 5 =
  24. 24.98 × 5 =
  25. 25.90 × 5 =
  26. 26.32 × 50 =
  27. 27.16 × 5 =
  28. 28.48 × 50 =
  29. 29.96 × 5 =
  30. 30.16 × 50 =
  31. 31.17 × 50 =
  32. 32.76 × 5 =
  33. 33.28 × 50 =
  34. 34.65 × 50 =
  35. 35.69 × 50 =
  36. 36.78 × 50 =
  37. 37.85 × 50 =
  38. 38.39 × 5 =
  39. 39.69 × 5 =
  40. 40.94 × 5 =

Answer key

  1. 2550
  2. 4600
  3. 1150
  4. 1200
  5. 105
  6. 1800
  7. 95
  8. 1650
  9. 355
  10. 285
  11. 1150
  12. 115
  13. 145
  14. 65
  15. 2400
  16. 370
  17. 90
  18. 170
  19. 4400
  20. 150
  21. 105
  22. 450
  23. 65
  24. 490
  25. 450
  26. 1600
  27. 80
  28. 2400
  29. 480
  30. 800
  31. 850
  32. 380
  33. 1400
  34. 3250
  35. 3450
  36. 3900
  37. 4250
  38. 195
  39. 345
  40. 470

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