Here is a list of all of the math skills students learn in grade 6! These skills are organized into categories :

Number sense,

Addition,

Subtraction,

Multiplication,

Division,

Variable expressions,

Functions,

Logical reasoning,

Patterns and sequences,

Money,

Units of measurement,

Time,

Understand fractions,

Decimals

Source : 

ca.ixl.com/math/grade-6