Hi. I'm Sarah Troutman. I teach kindergarten at Northeast Elementary. Today I will model addition to ten on the number line.
We will start by looking at a word problem. Tony had four packs of cards. He got three more packs of cards.
How many packs of cards does Tony have all together?
Since I see the word all together, I know this is an addition problem.
I will start to write an equation to represent the word problem. In the problem Tony started with four packs of cards.
I will write four to show the packs he begins with.
Then he gets three more packs of cards. I will write three in the equation to show the packs he receives.
To solve this problem I will use a number line.
The number line will go from 1 to 10. In the problem Tony started with 4 packs of cards.
I will begin at four to show the packs he starts with.
Then he gets three more packs. I will move forward three spots on the number line to represent the packs of cards he received.
One,
two,
three.
The number I land on will represent how many packs of cards Tony has all together.
Tony has seven packs of cards all together. I
will now complete the equation by writing the sum of seven. So four  plus three equals seven.
