Math vocabulary

The result of adding.

• sum

• difference

• estimate

The result of subtracting.

• sum

• difference

• estimate

A number sentence with an equal (=) sign to shows that two mathematical expressions are equivalent.

• rounding

• estimate

• equation

The sum of 0 and a number is the same as that number.

• associative property

• identity property

• commutative property

Changing the order of the addends does not change the sum.

• identity property

• commutative property

• associative property

Changing the grouping of the addends does not change the sum.

• commutative property

• associative property

• identity property

A process that determines which multiple of 10, 100, 1,000 and so on a number is closest to.

• rounding

• estimate

• equation

An approximate answer; to find an answer that is close to the exact answer.

• rounding

• estimate

• equation