Adding Tens
Add using mental math. 20 + 42 =
62
12x12=
144
This shape has 6 sides.
Hexagon
20x30=
600
This shape has 5 sides.
Pentagon
2x4x8=
64
This shape can be described as either equilateral, an isosceles or a scalene.
Triangle
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 four sides but they are not equal.
Triangle