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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 234 · 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. 1.65 × 5 =
  2. 2.14 × 50 =
  3. 3.22 × 50 =
  4. 4.14 × 50 =
  5. 5.94 × 50 =
  6. 6.91 × 5 =
  7. 7.16 × 5 =
  8. 8.14 × 5 =
  9. 9.16 × 5 =
  10. 10.21 × 5 =
  11. 11.90 × 5 =
  12. 12.23 × 50 =
  13. 13.33 × 50 =
  14. 14.41 × 50 =
  15. 15.51 × 5 =
  16. 16.87 × 50 =
  17. 17.62 × 5 =
  18. 18.94 × 5 =
  19. 19.56 × 5 =
  20. 20.13 × 50 =
  21. 21.25 × 5 =
  22. 22.54 × 50 =
  23. 23.98 × 5 =
  24. 24.69 × 5 =
  25. 25.86 × 50 =
  26. 26.12 × 5 =
  27. 27.62 × 5 =
  28. 28.46 × 50 =
  29. 29.44 × 5 =
  30. 30.69 × 50 =
  31. 31.82 × 5 =
  32. 32.31 × 50 =
  33. 33.26 × 5 =
  34. 34.39 × 5 =
  35. 35.57 × 5 =
  36. 36.73 × 50 =
  37. 37.12 × 5 =
  38. 38.92 × 5 =
  39. 39.13 × 50 =
  40. 40.35 × 50 =

Answer key

  1. 325
  2. 700
  3. 1100
  4. 700
  5. 4700
  6. 455
  7. 80
  8. 70
  9. 80
  10. 105
  11. 450
  12. 1150
  13. 1650
  14. 2050
  15. 255
  16. 4350
  17. 310
  18. 470
  19. 280
  20. 650
  21. 125
  22. 2700
  23. 490
  24. 345
  25. 4300
  26. 60
  27. 310
  28. 2300
  29. 220
  30. 3450
  31. 410
  32. 1550
  33. 130
  34. 195
  35. 285
  36. 3650
  37. 60
  38. 460
  39. 650
  40. 1750

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