5th Grade · Number & Operations—Fractions
Multiply Mixed Numbers
5.NF.B.6
Definition
To multiply mixed numbers, convert to improper fractions, multiply numerators and denominators, then simplify.
Examples
- 2 1/2 x 1 1/3 = 5/2 x 4/3 = 20/6 = 3 1/3.
- 1 3/4 x 2 = 7/4 x 2 = 14/4 = 3 1/2.
Key rule
Change mixed numbers to improper fractions first, then multiply.
Memory hook
Improper first, multiply second, simplify last.