add
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It depends on the context. 'Greater' is a relationship, not an operation. Add is an operation that means to take two or more quantities, regardless of their relative size, and find the sum of them. 'Greater' indicates that the specified term has a quantity that is more than the quantity of some other term. The fact alone that you are establishing or discovering this relationship does not indicate that you are required to add anything to either one.
On the other hand, the statement "Make 7 greater by 5" means add 7 and 5 together. But the terms 'greater', 'greater than', 'greater than or equal to', are more typically used in the context of relationship above.
increase means to add or greater than
Subtract and add the sign of the greater number.
wich one
does how many mean add or subtract
subtract
it means to subtract
deposit = add withdraw = subtract
add
Mark up would mean to add. Mark down would mean to subtract.
Total means to Add.
"How much ... all together ?" usually means add. "How much ... left ?" usually means subtract.
In the same way that you subtract and add numbers. Sometimes, though, if the answer is greater than 360 dgrees, you can subtract 360. This is because the angle measure of a whole turn and a bit is the same as the angle measure of the bit.