March 1, 2010

Today we went over the assigned homework, which one of the questions were number 17, on page 197 in the textbook. The "Addition Pyramid." At first I was confused, but the more we discussed it as a class, the more I understood. It's all about "combining like terms."

Here's the question:

17. Complete the addition pyramid. Find the value in any box by adding the expressions in the two boxes immediately below it.

Do you get the pattern?

So ...

first the pinkish purplish:

2x-1+x+3

= 3x+2

second the dark green:

3x-2+x+2

= 4x

third both of them combined:

x+3+3x-2

= 4x+1

That's all for my journal entry. Thanks for reading (:

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