Addition
2 + 2 = ____
What do you have to do with the addends?
Flip them around!
2 + 1 = 3
1 + 2 = 3
What does the FIRST number tell you when adding on a number line?
Where to start
3 + 2 = ____
6
The sum stays the _____
1 + 0 = 1
0 + 1 = 1
What does the SECOND addend tell you when adding on a number line?
How many "hops" to take.
4 + 3 = ____
7
Find the addends: 3 + 2 = 5
3 and 2
2 + 3 = 5
Show me on the board: 4 +6 = ____
10
4 + 5 = ___
9
Find the sum: 3 + 2 = 5
5
7 + 3 = 10
3 + 7 = 10
Show me on the board: 3 + 5 = __
8
5 + 5 = ____
10
22 + 50 = 72
50 + 22 = 72
Show me on the board: 3 +7 = ___
10