Here is a list of all of the math skills students learn in grade 2! These skills are organized into categories :

Counting and number patterns,
Comparing and ordering,
Names of numbers,
Patterns,
Addition - one digit , two digits , three digits,
Subtraction - one digit , two digits , three digits,
Place values,
rounding,
Units of measurement,
Two-dimensional shapes,
Three-dimensional shapes,
Geometric measurement,
Fractions,
Multiplication,
Division

Source : 
https://ca.ixl.com/math/grade-2