This can usually be done algebraically.
It really depends on the kind of energy. Different kinds of energy are calculated in different ways.
Joules (units of energy)
Well, isn't that a big number! Let's see, 9,000,000,000,000,000 billion is the same as 9 x 10^15 billion. To convert this to joules, we need to know what kind of energy we're talking about, as different forms of energy have different conversion factors. But don't worry, with a little bit of math and some research, you'll be able to find the answer and appreciate the vastness of the number!
by counting and calculating
Mental math! aka in ur head
by calculating their plays.
Add, subtract, multiply and divide as well as calculating powers. Pretty much anything you can do in math can be done in Excel.
You can use math in running by calculating how many miles or yards you have run.
calculating mentally, usually arithmetic
Calculating volume and surface area.
It means to calculate.
in almost every job field you have to calculate something and calculating is math