How do you teach addition and subtraction? Do you teach one first and then the other? Do you teach them at the same time?
Not sure what the right answer is.
We have been touching on both this year and working hard to build that number sense. But we had not been explicit about the connections between addition and subtraction. But the time has come.
Jess and I started with this:
We introduced the "whole-part-part" with hula hoops by asking: "What do you see?" And guess what...? Our number talks must be working because they replied with:
"Oh, I see two balloons and two more balloons. 2 and 2 make 4."
"I see two small hula hoops and one big hula hoop. 2 and 1 make 3."
Yep!! We love it!!
Our lesson was ready to start! We explained the whole number and how it can be broken into parts.
|(Sorry, this example is with the whole number: 5.)|
We helped them transfer this learning to paper.
This lesson is the foundation for our week of addition/subtraction lessons. Here are some activities we found (click on them for their original posts) and decided to use (with our own twists):
1. We want to make this anchor chart from "The Classroom Key" (one piece of it each day).
Our week will start off with a review of our hula hoop activity....but with chenille sticks and beads.
2. We want to show "whole-part-part" with plates like Dr. Jean.
3. Just another way to show "whole-part-part" but with hangers (can't find original source.)
4. We also want to do an activity with cubes. Each kid will have two different colors to make a part-part-whole equation.
I think it is going to be a fun week! But do you have any other suggestions? We are ALWAYS looking for more ideas!!