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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 602 · 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. 2.63 × 5 =
  3. 3.29 × 5 =
  4. 4.46 × 50 =
  5. 5.75 × 5 =
  6. 6.89 × 50 =
  7. 7.25 × 5 =
  8. 8.58 × 5 =
  9. 9.85 × 5 =
  10. 10.37 × 50 =
  11. 11.51 × 5 =
  12. 12.69 × 5 =
  13. 13.98 × 50 =
  14. 14.27 × 5 =
  15. 15.24 × 5 =
  16. 16.46 × 50 =
  17. 17.80 × 5 =
  18. 18.86 × 50 =
  19. 19.52 × 5 =
  20. 20.34 × 5 =
  21. 21.34 × 50 =
  22. 22.73 × 50 =
  23. 23.56 × 50 =
  24. 24.56 × 50 =
  25. 25.20 × 5 =
  26. 26.35 × 5 =
  27. 27.30 × 5 =
  28. 28.13 × 50 =
  29. 29.42 × 5 =
  30. 30.16 × 5 =
  31. 31.71 × 50 =
  32. 32.17 × 50 =
  33. 33.90 × 50 =
  34. 34.96 × 50 =
  35. 35.89 × 50 =
  36. 36.98 × 5 =
  37. 37.60 × 50 =
  38. 38.82 × 5 =
  39. 39.80 × 50 =
  40. 40.93 × 5 =

Answer key

  1. 1900
  2. 315
  3. 145
  4. 2300
  5. 375
  6. 4450
  7. 125
  8. 290
  9. 425
  10. 1850
  11. 255
  12. 345
  13. 4900
  14. 135
  15. 120
  16. 2300
  17. 400
  18. 4300
  19. 260
  20. 170
  21. 1700
  22. 3650
  23. 2800
  24. 2800
  25. 100
  26. 175
  27. 150
  28. 650
  29. 210
  30. 80
  31. 3550
  32. 850
  33. 4500
  34. 4800
  35. 4450
  36. 490
  37. 3000
  38. 410
  39. 4000
  40. 465

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