in maths add means to add numbers together . it is usally added in to an equation.
Add
increas
ADD
YOU add and multiply
to do it in your head its mental math.
In math the mean is the average. If you want the mean of a group of numbers you add them all together. Then you divide by the how many numbers there are.
Divide
add muliply subtract and divide
it means to add
solve means workout the answer to a math question
it means add or go up.
do you mean math equation? If you add a number to both sides of an equation you do not change it. That is called algebra