Operations Rules
When multiplying two fractions, multiply the numerator by the _________ and the denominator by the ___________.
numerator; denominator
2/9 + 5/9
7/9
3/5 - 1/5
2/5
3/4 * 1/2
3/8
1/2 / 2/3
3/4
When adding or subtracting fractions, the ____________ of those fractions needs to be the same.
denominator
5/12 + 1/12
1/2
15/7 - 8/7
1
4/5 * 3/6
2/5
3/4 / 5
3/20
True or False: When adding or subtracting fractions, we add or subtract the numerators only, and leave the denominator the same.
True
1/3 + 5/24
13/24
3/4 - 2/9
19/36
4/20 * 7/10
7/50
3/2 / 1
1 1/2
When dividing fractions, change the division sign to _____________ and _____________ the second fraction.
multiplication; flip/take the reciprocal of
3/5 + 7/15
1 1/15
3 1/2 - 1 1/2
2
1/2 * 3
1 1/2
19/10 / 1/5
9 1/2
What operation does the fraction bar (the line that separates the numerator and the denominator) always represent?
Division
2 1/4 + 3 3/4
6
4 5/6 - 3 5/12
1 5/12
5 1/2 * 2 3/4
15 1/8
12/5 / 1/8
19 1/5