Unit 9, Lesson 7
Add and Subtract within 1,000
Grade 2
Warm-up
Which Three Go Together: Add and Subtract within 100
Which 3 go together?
A
B
C
4 tens + 2 ones + 3 tens + 7 ones
D
Activity 1
Which Would You Rather Find?
A
G
B
H
C
I
D
J
E
K
F
L
- Circle 2 sums or differences you think are challenging. Find the value of 1 of these expressions. Show your thinking using drawings, numbers, or words.
- Choose 2 other expressions. Find the values. Show your thinking using drawings, numbers, or words.
Activity 2
Add and Subtract within 100
- Find the value of each expression.
A
G
B
H
C
I
D
J
E
K
F
L
- Choose 1 value that was less challenging to find. Explain your reasoning.
- Choose 1 value that was more challenging to find. Explain your reasoning.