Shapes
addition
subtraction
add 3 numbers
100

What shape has no corners and is round?

Circle

100

2+5

7

100

5-2

3

100

1 + 2 + 1 

4

200

What shape has 4 sides that are all the same length?

Square

200

7+3

10

200

8-4

4

200

3 + 2 + 3

8

300

This shape has 4 sides. Two sides are long. Two sides are short. 

Rectangle

300

10+5

15

300

10-4

6

300

4 + 6 + 5

15

400
What shape has 6 sides?

hexagon

400

20+7

27

400

15-6

9

400

10 + 5 + 4

19

500

What shape has 8 sides?

Octagon

500

25 + 7

32

500

26-4

22

500

20 + 4 + 3

27