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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 278 · 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. 1.81 × 50 =
  2. 2.47 × 50 =
  3. 3.29 × 5 =
  4. 4.63 × 5 =
  5. 5.56 × 5 =
  6. 6.50 × 50 =
  7. 7.19 × 50 =
  8. 8.12 × 5 =
  9. 9.49 × 50 =
  10. 10.92 × 5 =
  11. 11.72 × 5 =
  12. 12.24 × 5 =
  13. 13.96 × 5 =
  14. 14.23 × 5 =
  15. 15.29 × 50 =
  16. 16.18 × 5 =
  17. 17.70 × 5 =
  18. 18.72 × 50 =
  19. 19.19 × 5 =
  20. 20.43 × 50 =
  21. 21.12 × 5 =
  22. 22.58 × 50 =
  23. 23.31 × 5 =
  24. 24.63 × 5 =
  25. 25.23 × 50 =
  26. 26.52 × 50 =
  27. 27.46 × 50 =
  28. 28.26 × 50 =
  29. 29.33 × 5 =
  30. 30.96 × 5 =
  31. 31.22 × 5 =
  32. 32.68 × 5 =
  33. 33.98 × 50 =
  34. 34.71 × 5 =
  35. 35.95 × 5 =
  36. 36.19 × 50 =
  37. 37.87 × 50 =
  38. 38.27 × 5 =
  39. 39.64 × 50 =
  40. 40.64 × 5 =

Answer key

  1. 4050
  2. 2350
  3. 145
  4. 315
  5. 280
  6. 2500
  7. 950
  8. 60
  9. 2450
  10. 460
  11. 360
  12. 120
  13. 480
  14. 115
  15. 1450
  16. 90
  17. 350
  18. 3600
  19. 95
  20. 2150
  21. 60
  22. 2900
  23. 155
  24. 315
  25. 1150
  26. 2600
  27. 2300
  28. 1300
  29. 165
  30. 480
  31. 110
  32. 340
  33. 4900
  34. 355
  35. 475
  36. 950
  37. 4350
  38. 135
  39. 3200
  40. 320

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