Question

a)1/3+3/8-7/12

c) 6/7+5/8:5-3/16×(-2)²

 

Answer 1

a) \(\frac{1}{3}+\frac{3}{8}-\frac{7}{12}=\frac{8}{24}+\frac{9}{24}-\frac{14}{24}=\frac{8+9-14}{24}=\frac{3}{24}=\frac{1}{8}\)

b) \(\frac{6}{7}+\frac{5}{8}:5-\frac{3}{16}.\left(-2\right)^2\)

\(=\frac{6}{7}+\frac{1}{8}-\frac{3}{16}.4=\frac{6}{7}+\frac{1}{8}-\frac{3}{4}\)

\(=\frac{48}{56}+\frac{7}{56}-\frac{42}{56}\)

\(=\frac{13}{56}\)

Answer 2

a, đáp số là 1/8

b, đáp số là 13/56