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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 767 · 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. 1.82 × 50 =
  2. 2.56 × 5 =
  3. 3.13 × 50 =
  4. 4.53 × 5 =
  5. 5.77 × 5 =
  6. 6.17 × 50 =
  7. 7.17 × 50 =
  8. 8.27 × 5 =
  9. 9.20 × 5 =
  10. 10.22 × 50 =
  11. 11.13 × 5 =
  12. 12.20 × 50 =
  13. 13.16 × 50 =
  14. 14.45 × 5 =
  15. 15.55 × 5 =
  16. 16.27 × 50 =
  17. 17.81 × 50 =
  18. 18.28 × 50 =
  19. 19.79 × 50 =
  20. 20.21 × 50 =
  21. 21.33 × 50 =
  22. 22.95 × 50 =
  23. 23.87 × 50 =
  24. 24.33 × 50 =
  25. 25.29 × 5 =
  26. 26.87 × 5 =
  27. 27.97 × 5 =
  28. 28.26 × 5 =
  29. 29.96 × 50 =
  30. 30.40 × 5 =
  31. 31.40 × 5 =
  32. 32.37 × 5 =
  33. 33.95 × 5 =
  34. 34.58 × 5 =
  35. 35.14 × 5 =
  36. 36.98 × 50 =
  37. 37.23 × 5 =
  38. 38.51 × 50 =
  39. 39.47 × 5 =
  40. 40.65 × 5 =

Answer key

  1. 4100
  2. 280
  3. 650
  4. 265
  5. 385
  6. 850
  7. 850
  8. 135
  9. 100
  10. 1100
  11. 65
  12. 1000
  13. 800
  14. 225
  15. 275
  16. 1350
  17. 4050
  18. 1400
  19. 3950
  20. 1050
  21. 1650
  22. 4750
  23. 4350
  24. 1650
  25. 145
  26. 435
  27. 485
  28. 130
  29. 4800
  30. 200
  31. 200
  32. 185
  33. 475
  34. 290
  35. 70
  36. 4900
  37. 115
  38. 2550
  39. 235
  40. 325

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