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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 809 · 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. 1.42 × 5 =
  2. 2.22 × 5 =
  3. 3.27 × 5 =
  4. 4.17 × 5 =
  5. 5.72 × 50 =
  6. 6.72 × 50 =
  7. 7.12 × 50 =
  8. 8.14 × 50 =
  9. 9.17 × 5 =
  10. 10.19 × 50 =
  11. 11.80 × 5 =
  12. 12.42 × 5 =
  13. 13.87 × 50 =
  14. 14.59 × 50 =
  15. 15.67 × 50 =
  16. 16.43 × 50 =
  17. 17.49 × 5 =
  18. 18.32 × 5 =
  19. 19.44 × 50 =
  20. 20.87 × 5 =
  21. 21.68 × 50 =
  22. 22.24 × 5 =
  23. 23.51 × 5 =
  24. 24.41 × 50 =
  25. 25.27 × 5 =
  26. 26.20 × 5 =
  27. 27.74 × 50 =
  28. 28.30 × 50 =
  29. 29.55 × 5 =
  30. 30.93 × 5 =
  31. 31.69 × 5 =
  32. 32.44 × 50 =
  33. 33.30 × 5 =
  34. 34.19 × 50 =
  35. 35.96 × 5 =
  36. 36.24 × 5 =
  37. 37.73 × 50 =
  38. 38.30 × 50 =
  39. 39.70 × 50 =
  40. 40.80 × 50 =

Answer key

  1. 210
  2. 110
  3. 135
  4. 85
  5. 3600
  6. 3600
  7. 600
  8. 700
  9. 85
  10. 950
  11. 400
  12. 210
  13. 4350
  14. 2950
  15. 3350
  16. 2150
  17. 245
  18. 160
  19. 2200
  20. 435
  21. 3400
  22. 120
  23. 255
  24. 2050
  25. 135
  26. 100
  27. 3700
  28. 1500
  29. 275
  30. 465
  31. 345
  32. 2200
  33. 150
  34. 950
  35. 480
  36. 120
  37. 3650
  38. 1500
  39. 3500
  40. 4000

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