Partial Products Slidecast

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  • 1. Partial Products Multiplication By Mr. Kish
  • 2. Pros and Cons
    • Pros
    • Reinforces the understanding of place value
    • Closely related to how a problem would be solved mentally
    • More “logical”
    • Cons
    • Sometimes hard to remember order of steps
    • More lines of work
    • Seems to take longer
    • Not as widely used
  • 3. An example of partial products 6 3 5 4 x
  • 4. An example of partial products x Make an estimate 6 3 5 4
  • 5. An example of partial products x Make an estimate 60 * 50 6 3 5 4
  • 6. An example of partial products x Make an estimate 60 * 50 = 3,000 6 3 5 4
  • 7. An example of partial products x 6 3 5 4
  • 8. An example of partial products 6 3 5 4 x 0 0 6 3 5 4
  • 9. An example of partial products x 0 0 6 3 5 4
  • 10. An example of partial products x 0 3000 60 * 50 6 3 5 4
  • 11. An example of partial products x 0 0 3000 240 60 * 4 6 3 5 4
  • 12. An example of partial products x 0 0 3000 240 150 3 * 50 6 3 5 4
  • 13. An example of partial products x 0 0 3000 240 150 12 3 * 4 6 3 5 4
  • 14. An example of partial products 3000 x 0 0 240 150 12 + 6 3 5 4
  • 15. An example of partial products 3000 x 0 0 240 150 12 + 3402 6 3 5 4
  • 16. An example of partial products 9 1 6 2 x
  • 17. An example of partial products x Make an estimate 9 1 6 2
  • 18. An example of partial products x Make an estimate 90 * 60 9 1 6 2
  • 19. An example of partial products x Make an estimate 90 * 60 = 5,400 9 1 6 2
  • 20. An example of partial products x 9 1 6 2
  • 21. An example of partial products x 0 0 9 1 6 2
  • 22. An example of partial products x 0 0 9 1 6 2
  • 23. An example of partial products x 0 0 5400 90 * 60 9 1 6 2
  • 24. An example of partial products x 0 0 5400 180 90 * 2 9 1 6 2
  • 25. An example of partial products x 0 0 5400 180 60 1 * 60 9 1 6 2
  • 26. An example of partial products x 0 0 5400 180 60 2 1 * 2 9 1 6 2
  • 27. An example of partial products x 0 0 5400 180 60 2 + 9 1 6 2
  • 28. An example of partial products x 0 0 5400 180 60 2 + 5642 9 1 6 2
  • 29. A more complex example 6 4 2 x 3 5 1
  • 30. A more complex example 6 4 2 x 1 8 0 0 0 0 3 0 0 0 0 1 2 0 0 0 6 0 0 600 * 300 600 * 50 600 * 1 40 * 300 2 2 5 3 4 2 3 5 1 2 0 0 0 4 0 1 0 0 6 0 0 40 * 50 40 * 1 2 * 300 2 * 50 2 2 * 1