8 terms

Sum

The result of adding two or more numbers

Difference

The result of subtracting one number from another

Algorithm

A set of step -by-step instructions for doing something (example-doing a computation).

Estimate

An answer that should be close to an exact answer

Number sentence

At least two numbers or expressions separated by a relation symbol (=, <, >). Most have at least one operation (-, +, *, /)

Solution

A value that makes a sentence true when it is substituted for the variable.

Variable

A letter or other symbol that represents a number. (example 5 + n = 9)

Expanded notation

A way of writing a number as the sum of the values of the digits. (example 356 = 300 + 50 + 6)