Hi. I'm Maria Cotton. I teach first grade at Beall Elementary.
Today, I'm going to model addition to twenty using a number line.
Today's problem is Andy had twelve M&Ms. He was given five more.
How many M&Ms does Andy have altogether?
First, I'll look for important information in my word problem. I
see the word altogether.
Altogether is an important vocabulary word.
When I think of altogether, I think of adding. Putting two parts together.
Therefore, today we're going to create an addition problem.
I'm
going to look back at my numbers in my word problem for information.
Andy had twelve
M&Ms. Twelve is the number that Andy started with so I'm going to circle twelve.
He was given five more. That tells me that I'm going to add five
to the twelve.
I'm going to write the number twelve for fart my first number on my equation.
twelve
plus
five
Now, I'm going to find out how many M&Ms Andy has altogether.
I'm going to use a number line
from one to twenty to solve this equation. I
Know that Andy had twelve M&Ms, so I'm going to locate the number twelve on the number line. I
found the number twelve. I'm going to place a marker above the number twelve so I know where I'm starting.
Now, I
know that he was given five more M&Ms. I
know that I'm going to move to the right of my number line and as I move to the right, my numbers will increase.
I'm going to start at the number twelve, and I'm going to jump five
spaces.
One,
two, three, four, five. I
ended at the number seventeen.
So, I know that twelve plus five more
equals
seventeen. I
just solved my problem of how many M&Ms does Andy have altogether.
Twelve plus five equals seventeen.
