Answer
Estimate: 2$\times$7$\times$1=14
Exact: $21\frac{3}{8}$
Work Step by Step
$2\frac{1}{4}.7\frac{1}{8}.1\frac{1}{3}$
First we need to find Estimate:
$2\frac{1}{4}$ rounded to 2
$7\frac{1}{8}$ rounded to 7
$1\frac{1}{3}$ rounded to 1
2$\times$7$\times$1=14 (Estimate)
Now we need to find Exact:
$2\frac{1}{4}.7\frac{1}{8}.1\frac{1}{3}$
= $\frac{9}{4}\times\frac{57}{8}\times\frac{4}{3}$
= $\frac{9\times57\times4}{4\times8\times3}$
= $\frac{3\times57}{8}$
= $\frac{171}{8}$
= $21\frac{3}{8}$
