1.5 Fraction Review
Multiplication of Fractions
1) Cancel terms prior to multiplying (when possible)
2) Multiply reduced numerators and denominators 3) Reduce the answer to lowest terms.
Ex. a)
b)
c)
1
Dividing with Fractions
1) To divide fractions, we multiply by the
reciprocal of the divisor.
"What we are dividing by, turn upside down and multiply."
"Keep, change, flip"
Ex a) b)
2
Addition and Subtraction
1) We need an LCD ( lowest common denominatorto
add or subtract fractions.
2) When we change a denominator, we
must change the numerator in the sameway.
Ex. a)
+
b) ­ HW: 1D ­Pg. 19 # 10, 11, 13
1P ­Pg. 203­204 # 1abc, 2abc, 4abc, 5abc, 8
3