1. Represent and solve word problems involving addition and subtraction
2.OA.1
Represent and solve word problems involving addition and subtraction

2. Choose an expression to solve and explain your strategy
13 + 7
Warm Up for solving addition problems mentally
Choose an expression to solve and explain your strategy

3. Choose an expression to solve and explain your strategy
13 - 7
Warm Up for solving subtraction problems mentally
Choose an expression to solve and explain your strategy

4. What operation will you use to solve this word problem? Now Solve
I have 14 toy cars and I let my friend borrow some. Now I have 5 toy cars. How many cars did I let my friend borrow?
Take From/Change Unknown
14 – X = 5
What operation will you use to solve this word problem? Now Solve

5. Is there more than one way to write the number sentence?
Write the number sentence for the word problem below.
Jesse is fishing. She caught 14 fish and put them in a net. Some swam away. Now she has 6 fish left. How many swam away?
Add to or take from? Change Unknown
14 - ? = 6 or
6 + ? = 14
Is there more than one way to write the number sentence?

6. Which word problem is described by the number sentence below?
I have some apples and someone gave me 15 more. I now have 23 apples.
I have 15 apples and then someone gave me more. I now have 23 apples.
The first is an add to/ start unknown
The second is a add to/ change unknown
15 + ? = 23

7. I have 9 baseball cards. I want to display them in two different folders. What are all the ways I can display the baseball cards?
Put togther- Take Apart – Both addends unknown
0 and 9
1 and 8
2 and 7
3 and 6
4 and 5
5 and 4
6 and 3
7 and 2
8 and 1
9 and 0