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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 139 · 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. 1.93 × 50 =
  2. 2.18 × 50 =
  3. 3.55 × 5 =
  4. 4.12 × 50 =
  5. 5.20 × 5 =
  6. 6.61 × 50 =
  7. 7.20 × 50 =
  8. 8.48 × 5 =
  9. 9.51 × 50 =
  10. 10.13 × 5 =
  11. 11.25 × 50 =
  12. 12.62 × 50 =
  13. 13.84 × 5 =
  14. 14.43 × 50 =
  15. 15.50 × 5 =
  16. 16.42 × 50 =
  17. 17.34 × 5 =
  18. 18.66 × 50 =
  19. 19.81 × 50 =
  20. 20.95 × 5 =
  21. 21.82 × 50 =
  22. 22.64 × 50 =
  23. 23.53 × 5 =
  24. 24.72 × 50 =
  25. 25.12 × 5 =
  26. 26.23 × 50 =
  27. 27.76 × 5 =
  28. 28.68 × 50 =
  29. 29.27 × 50 =
  30. 30.91 × 50 =
  31. 31.80 × 5 =
  32. 32.67 × 50 =
  33. 33.93 × 50 =
  34. 34.28 × 5 =
  35. 35.14 × 50 =
  36. 36.16 × 50 =
  37. 37.12 × 50 =
  38. 38.31 × 5 =
  39. 39.37 × 50 =
  40. 40.42 × 50 =

Answer key

  1. 4650
  2. 900
  3. 275
  4. 600
  5. 100
  6. 3050
  7. 1000
  8. 240
  9. 2550
  10. 65
  11. 1250
  12. 3100
  13. 420
  14. 2150
  15. 250
  16. 2100
  17. 170
  18. 3300
  19. 4050
  20. 475
  21. 4100
  22. 3200
  23. 265
  24. 3600
  25. 60
  26. 1150
  27. 380
  28. 3400
  29. 1350
  30. 4550
  31. 400
  32. 3350
  33. 4650
  34. 140
  35. 700
  36. 800
  37. 600
  38. 155
  39. 1850
  40. 2100

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