What i learned in math in forth grade is angles,long division,short multipulcation, grid math, 3D shapes, and 2D shapes long divison is really hard for me , there are 6 steps to long division, divide,multiply,subtract,compare,repeat.

Angles have different names acute angles, obtuse angels, and right angles. Acute angles are less than 90 degrees obtuse angles are more than 90 degrees and right angles are exactly 90 degrees.

Short multipulcation is the old way to multiply two or three or even more ways to multiply digits.

Grid math is a longer way to do math it is a way newer way to multiply more than 2 digits.

3D shapes are life size 2D shapes, they have twice as many more vertices and edges than 2D shapes.

We did not just learn about 2D shapes but we learned new stuff about them,2D shapes are flat shapes, there are more 3D shapes than 2D shapes.

I had fun in forth grade learning about math i hope u do too!