MA+8+notes+unit+1+day+5+Adding+Subt+fractions

Day notes: Adding and Subtracting Fractions

Rules: (1) When the denominators are the same, simply add or subtract the numerators.

e.g

e.g. __11__ - __2__ = __9__ > 15 15 15

(2) When the denominators are different, re-write the fractions into their respective equivalent fractions so that they share the same denominator (using LCM). Then follow rule #1.

e.g. __1__ + __1__ = __3__ + __2__ = __5__ > 4 6 12 12 12

e.g. __1__ - __1__ = __3__ - __2__ = __1__ > 2 3 6 6 6