Adding Tens
12x12=
144
This shape has 4 sides.
Square
20x30=
600
This shape has 3 sides.
Triangle
2x4x8=
64
This shape has 5 sides.
Pentagon
1,000x50=
50,000
This shape has 8 sides.
Octagon
Tad has 70 seashells. He finds 2 times more shells. How many seashells does Tad have in all?
140
I have six sides.
Hexagon