Unit 2: Adding and Subtracting Decimals Unit

difference

the solution to a subtraction problem

greater than

is more than; is larger than; above

inequality

A mathematical statement that compares two values using

less than

is less than; fewer than; is smaller than; below

place value

describes the numerical value that a digit has based on its position

sum

the solution to an addition problem

Compatible Numbers

Numbers that are easy to work with mentally and close to the actual numbers.

Estimate

To find an answer that is close to the exact answer.

Round

To change a number to a nearby number that is easier to use while keeping its value close to the original.

Thousandths

The third place to the right of the decimal point.

Expanded Notation

A way to write a number that shows the value of each digit, often using multiplication.