Question

3/7×(1/4+7/12)
помогите решить ​

Answer 1

$\frac{3}{7} *(\frac{1}{4}+\frac{7}{12} )=\frac{3}{7} *(\frac{3}{12}+\frac{7}{12} )=\frac{3}{7} *\frac{10}{12}=\frac{10}{7*4} =\frac{5}{7*2} =\frac{5}{14}$