7 terms

Essential Math Concepts are a reorganization of the Grade 7 California standards into eight categories. The topics comprise 70% of the CST questions.

additive inverse

Two numbers are additive inverses of each other if their sum is 0: -4+4=0.

algebraic expression

An expression that is written using one or more variables: 2a+5 or a+b.

equation

A sentence that uses an equals sign to show that two groups are equal: y=3+7.

inequality

A sentence that shows the relationship between quantities that are not equal, using <, >, <, > sings: 6<9.

inverse operation

Operations that undo each other: 20-5=15 and 15+5=20.

multiplicative inverse

The reciprocal of a number: The muliplicative inverse of 2 is 1/2.

variable

A letter used to represent one or more numbers: in 5a and 2y=8; a and y are variables.