Addition and Subtraction Vocab

Front

Equation

Back

A number sentence using '=' to show two expressions have the same value.

Tags

CCSS.6.EE.A.1

Front

Operations that can undo each other

Back

Inverse Operations

Tags

CCSS.7.NS.A.1B

Front

Algorithm

Back

A set of steps to solve a math problem.

Tags

CCSS.7.NS.A.3

Front

Symbol or letter for an unknown number

Back

Variable

Tags

CCSS.6.EE.B.6

Front

Counting up from the lesser to the greater number to find the difference.

Back

Counting on

Tags

CCSS.1.OA.C.6

Front

Estimate

Back

An approximate number or answer

Front

Group of 3 digits in a number, separated by a comma, from the right

Back

Period

Tags

CCSS.4.NBT.A.2

Front

Rounding

Back

The process that determines which multiple of 10, 100, 1000, etc., a number is closest to.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

Choosing numbers close to those in a problem for easier computation, then adjusting the answer.

Back

Compensation

Tags

CCSS.HSN.CN.A.2

Front

This property states that addends can be regrouped and the sum remains the same.

Back

Associative Property

Tags

CCSS.1.OA.B.3