pound
Is a number sentence that does not equal anything or has an equal sign.
Equation
An expression does not contain an equality sign.
A number sentence that equals or that has an equal sign.
An equation.
The answer, the solution.
a number sentence contains an equal sign
pi is an irrational number that is approximately equal to 3.14
It's called an expression!! An expression has no meaning because it has no equal sign. ex: a*b
All positive numbers are equal to their positives. Also, the absolute value of a number is the number ignoring the sign (and thus equal to the positive value of the number). eg |-1| = 1.
5+101=106
a variable expression