7
Exactly what it says:
double means multiply by 2, so double 2 means multiply 2 by 2 (to get 4)
and then add 5 to the result of this (to get 4 + 5 = 9).
Add
7
It can be known as: Multiply, Divide, Add, and Subtract...and more.
increas
To attach or add
YOU add and multiply
ADD
You have to add the sum up and divide it by the numbers there are there. Like 5 7 8 9 add it up it's 29 29 divide by 4. Which I'd 5 rem 4
11
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.
in maths add means to add numbers together . it is usally added in to an equation.