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Unit 1, Lesson 1

Add and Subtract within 10

Grade 2

Warm-up

What do you know about math?

Activity 1

Choose 2 cards. Find the value of the sum or difference.
Check off the number you found. Write the expression.
The partner who checks off the most numbers wins.

	found it!	expression
0
1
2
3
4
5
6
7
8
9
10

Activity 2

Match each expression to the value of the sum or difference.
- 9
- 3
- 8
- 7
- 1
- 4
- 2
Circle the addition expressions with a value of 10.
What patterns do you notice in the expressions with a value of 10?