Today we started talking about mental math, and some strategies we can utilize when adding numbers mentally.
I know that addition is combining terms. This means I can break apart those terms as I see fit and combine them in any way that would make it easy on myself.
For example a simple problem like 9 + 7
I can see that my answer is going to be larger than 10. So I try to make a ten easily first. I know that 9 is one away from ten. This means I’m going to break up my 7 into a 1, and a 6.
So my problem goes from
9 + 7
to
9 + 1 + 6
10 + 6
16
This is a good strategy for students to have when adding numbers, and one of many we will be working on.
Tonight students should finish this simple worksheet on this idea. Please make sure you read the directions:
mental-math-practice
We also did a good round of centers today, some focused on base number systems, and others on our own base 10 system.
We also got together some of the parts that we will be using tomorrow to make an abacus!
We will be adding and subtracting with our abacus, and we’ll have to make a video where we solve a problem using the abacus.
Finally we took some quick notes on addition:
addition-notes
Have a good one,
-Mr. Potter