Cheese Pies & Drinks #MFM2P #3ActMath

Last catch-up post from December; our cheese pies & drinks problem for linear systems in the Grade 10 applied class. Overview:I’ll break it down into the 3 acts.

Act 1: Notice, wonder, & estimate

What do you notice & wonder?

Act 2: Data collection & solving

Presented the class with the cost of each order:

Groups went to their boards to solve:All of the groups subtracted the smaller order from the larger order twice in order to eliminate the cheese pies and leave the cost of 2 drinks, from which they easily determined the cost of 1 drink. Then went back to calculate the cost of a cheese pie.

Act 3: Answer check / resolution / consolidation

Then I did some direct teaching on how to use the elimination method when you need to multiply one of the equations in order to eliminate a variable:

We discussed how the multiplying of “her” equation by 2 mimics how my students subtracted the smaller order two times in their solutions.

Day 2

We consolidated our learning about the elimination method by describing each step in the solution. Handout here.