fractions
The quotient of one number divided by another non-zero number, the number that is divided above the horizontal line and the number that is divided below the horizontal line.
Addition of fractions
Find a common denominator (making the denominators the same), add the numerators, and simplify.
Subtraction of fractions
Dissolve (make the denominators the same). Subtract numerators from each other. Divide by two.
Multiplication of fractions
Multiply numerators by each other and denominators by each other. If you divide by the divisor in the middle of the calculation, you can save yourself the trouble of dividing by the divisor at the end.
division of fractions
Invert the fraction to be divided (upside down). Multiply the numerators by each other and the denominators by each other. If you divide by the divisor in the middle of the calculation, you can save yourself the trouble of dividing by the divisor at the end.