$1.97 + ______ = $5.00?As with any equation, the trick is to keep each side left and right of the = sign balanced.
So what you do to one side, you must do to the other.
In this case we have 1.97 + x = 5
I use x to denote the variable, the amount we want to discover.
To work out what it is, we need to isolate it on one side of the = sign. We do this by subtracting 1.97.
Because we do it on the left, we must also do it on the right. So on the left you will have x
And then you need to take away 1.97 from the 5 too
x = 5 - 1.97
That would then be
x = 3.03
SO your answer is $3.03!