Answer
Estimate: 5 - 2 = 3
Exact:$2\frac{5}{8}$
Work Step by Step
$5-2\frac{3}{8}$
First Lets Find Estimate:
$2\frac{3}{8}$ rounds to 2
Now, $5-2\frac{3}{8}$ = 5 - 2 = 3
Now find Exact:
$5-2\frac{3}{8}$
= $5-\frac{2\times8+3}{8}$
= $5-\frac{19}{8}$
= $\frac{5\times8}{1\times8}-\frac{19}{8}$ (LCM of 1 & 8 is 8)
= $\frac{40}{8}-\frac{19}{8}$
= $\frac{40-19}{8}$
= $\frac{21}{8}$
= $2\frac{5}{8}$