Question

subtract mixed numbers with like denominators — quiz — level
find $3\frac{6}{8}-1\frac{5}{8}$.
does a whole on the model need to be broken before subtracting?
no because the model does show enough eighths to subtract $\frac{5}{8}$.
first, subtract the parts.
$3\frac{6}{8}-1\frac{5}{8}=(3-1)+\left(\frac{6}{8}-\frac{5}{8}\
ight)$
$=(3-1)+\frac{1}{\square}$

Explanation:

Step1: Subtract the fraction parts

$\frac{6}{8} - \frac{5}{8} = \frac{1}{8}$

Step2: Subtract the whole number parts

$3 - 1 = 2$

Step3: Combine the two results

$2 + \frac{1}{8}$

Answer:

$2\frac{1}{8}$

For the fill-in blank under the fraction: the denominator is $\boldsymbol{8}$