Question

How do you evaluate the following expression using decimals?:
$4.56-\frac{4}{5}+3.21+\frac{17}{32}$

Answer 1

The best way is to convert each fraction to decimal form. Two of them are already in decimal form. $\frac{4}{5}=\frac{4\times 2}{5\times 2}=\frac{8}{10}=0.8$ and $\frac{17}{32}=\frac{17\times 3125}{32\times 3125}=\frac{50125}{100000}=0.50125$
$\therefore 4.56-0.8+3.21+0.50125=7.47125$