GoMath 4th Grade Chapter 1 Vocabulary

The period after the ones period in the base-ten number system.

• hundreds

• tens

• ones

• thousands

To replace a number with another number that tells about how many or how much.

• round

• estimate

• period

• thousands

A way to write numbers by showing the value of each digit.

• expanded form

• standard form

• word form

• number form

A way to write numbers using words.

• expanded form

• standard form

• word form

• number words

A number close to the exact amount.

• round

• estimate

• period

• thousands

A way to write numbers by using the digits 0-9, with each digit having a place value.

• standard form

• expanded form

• word form

• number form

Each group of the three digits in a multi-digit number.

• period

• estimate

• round

• inverse operation

Operations that undo each other, such as addition and subtraction or multiplication and division.

• order of operations

• inverse operations

• mathematical operations

• medical operations