Vocabulary
Something a number sentence must have
Equal sign
A shape with zero sides
Circle
22 - 11
11
5 + 1
6
What is a 2D shape
A shape with 2 dimensions
Numbers that are added together
Addends
A shape with 3 sides
Triangle
56 - 33
23
10 + 10
20
What is a 3D shape?
A figure with 3 dimensions
A number sentence needs an equal sign. What else does a number sentence need to have?
Math operation
A shape with 4 sides
Rectangle
84 - 21
63
9 + 3
12
The measure of the inside of a 2D shape
The answer to a subtraction problem
Difference
A shape with 5 sides
Pentagon
53 - 17
36
8 - 5
3
Do you measure area with a 3D shape? Yes or no
No (Volume)
The answer to an addition problem
Sum
What is a square?
A shape with 4 sides that are equal in length
45 - 26
19
10 - 7
3
In a rectangle with 20 squares inside, what is the area?
20 square units