It depends on how the rest of the question is worded. If it says "how many were left," for example, that means to subtract. On the other hand, if it says something like "how many were added," it means to add.
"How much ... all together ?" usually means add. "How much ... left ?" usually means subtract.
addingsubtractingmultiplicationdivision
The term SUM means add and DIFFERRENCE means subtract. They are opposites.
The opposite of add is subtract.
does how many mean add or subtract
it means to subtract
you have to subtract because when you say hw many than you have to add when you say how much you have to subtract.
deposit = add withdraw = subtract
it means to subtract
Total means to Add.
Subtract the number of green votes from the number of blue votes.
increase means to add or greater than
wich one
after filling a gas tank the odometer read 19,874.5. After the next filling it read 20,105.5. It took 17.5 gal. to fill the tank. How many miles per gallon did the driver get? How many just means to count up the answer. You could add, subtract, multiply or divide to get there. This answer is 13.2 mpg.
According to the order of operations, addition and subtraction have the same precedence. That means that you add/subtract from left to right. PEMDAS is misleading use PEMorDSorA
Increase means to add (assuming the number you "increase" is positive of course).