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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 27 · 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. 1.80 × 50 =
  2. 2.27 × 50 =
  3. 3.77 × 5 =
  4. 4.75 × 5 =
  5. 5.97 × 5 =
  6. 6.20 × 5 =
  7. 7.73 × 50 =
  8. 8.77 × 50 =
  9. 9.13 × 50 =
  10. 10.45 × 50 =
  11. 11.13 × 5 =
  12. 12.68 × 50 =
  13. 13.38 × 50 =
  14. 14.78 × 50 =
  15. 15.27 × 50 =
  16. 16.66 × 5 =
  17. 17.84 × 50 =
  18. 18.65 × 5 =
  19. 19.67 × 50 =
  20. 20.37 × 50 =
  21. 21.42 × 5 =
  22. 22.15 × 50 =
  23. 23.76 × 5 =
  24. 24.71 × 50 =
  25. 25.92 × 5 =
  26. 26.97 × 5 =
  27. 27.84 × 50 =
  28. 28.85 × 50 =
  29. 29.12 × 50 =
  30. 30.38 × 50 =
  31. 31.63 × 5 =
  32. 32.33 × 5 =
  33. 33.47 × 50 =
  34. 34.26 × 50 =
  35. 35.18 × 5 =
  36. 36.98 × 50 =
  37. 37.46 × 50 =
  38. 38.15 × 5 =
  39. 39.78 × 50 =
  40. 40.14 × 50 =

Answer key

  1. 4000
  2. 1350
  3. 385
  4. 375
  5. 485
  6. 100
  7. 3650
  8. 3850
  9. 650
  10. 2250
  11. 65
  12. 3400
  13. 1900
  14. 3900
  15. 1350
  16. 330
  17. 4200
  18. 325
  19. 3350
  20. 1850
  21. 210
  22. 750
  23. 380
  24. 3550
  25. 460
  26. 485
  27. 4200
  28. 4250
  29. 600
  30. 1900
  31. 315
  32. 165
  33. 2350
  34. 1300
  35. 90
  36. 4900
  37. 2300
  38. 75
  39. 3900
  40. 700

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