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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 773 · 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. 1.38 × 50 =
  2. 2.22 × 50 =
  3. 3.66 × 5 =
  4. 4.65 × 50 =
  5. 5.48 × 5 =
  6. 6.64 × 5 =
  7. 7.64 × 5 =
  8. 8.42 × 50 =
  9. 9.35 × 5 =
  10. 10.65 × 50 =
  11. 11.73 × 50 =
  12. 12.98 × 50 =
  13. 13.23 × 50 =
  14. 14.28 × 50 =
  15. 15.42 × 5 =
  16. 16.79 × 50 =
  17. 17.64 × 50 =
  18. 18.21 × 5 =
  19. 19.97 × 5 =
  20. 20.98 × 50 =
  21. 21.24 × 50 =
  22. 22.93 × 50 =
  23. 23.62 × 5 =
  24. 24.73 × 50 =
  25. 25.12 × 5 =
  26. 26.15 × 50 =
  27. 27.18 × 50 =
  28. 28.33 × 50 =
  29. 29.18 × 5 =
  30. 30.26 × 50 =
  31. 31.28 × 5 =
  32. 32.41 × 50 =
  33. 33.24 × 5 =
  34. 34.48 × 50 =
  35. 35.26 × 50 =
  36. 36.22 × 50 =
  37. 37.63 × 50 =
  38. 38.19 × 50 =
  39. 39.78 × 50 =
  40. 40.85 × 5 =

Answer key

  1. 1900
  2. 1100
  3. 330
  4. 3250
  5. 240
  6. 320
  7. 320
  8. 2100
  9. 175
  10. 3250
  11. 3650
  12. 4900
  13. 1150
  14. 1400
  15. 210
  16. 3950
  17. 3200
  18. 105
  19. 485
  20. 4900
  21. 1200
  22. 4650
  23. 310
  24. 3650
  25. 60
  26. 750
  27. 900
  28. 1650
  29. 90
  30. 1300
  31. 140
  32. 2050
  33. 120
  34. 2400
  35. 1300
  36. 1100
  37. 3150
  38. 950
  39. 3900
  40. 425

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