It's always easiest to convert mixed numbers to improper fractions.
for adding, find the lowest common denominator
for multiplying, just multiply/divide
9 9/10 × 8 8/9 = 99/10 * 80/9 = 88
15 11/15 + 14 5/9 + 7 3/5
= 708/45 + 655/45 + 342/45
= 1705/45
= 341/9
= 37 8/9
and so on
For each of the following perform the given operations. If possible , write your answer as a Mixed Number.
a) 9 9/10 × 8 8/9
b) -5 5/12 ÷ 3 1/18
c) 15 11/15 + 14 5/9 + 7 3/5
d) 42 7/24 -23 19/30
1 answer
9 answers