Đáp án:
Giải thích các bước giải:
a) 2.$\frac{3}{7}$ +($\frac{5}{9}$ -1$\frac{3}{7}$ ) -$\frac{8}{2}$: 1$\frac{1}{23}$
=$\frac{6}{7}$ +($\frac{5}{9}$ -$\frac{10}{7}$ ) -4 :$\frac{24}{23}$
=$\frac{6}{7}$ +$\frac{5}{9}$ -$\frac{10}{7}$ -$\frac{23}{6}$
=$\frac{-4}{7}$ +$\frac{5}{9}$ -$\frac{23}{6}$
=$\frac{-485}{126}$
b) $\frac{-11}{32}$ .$\frac{6}{7}$ +$\frac{8}{7}$ -$\frac{-11}{23 }$ -$\frac{1}{23 }$
=$\frac{-33}{112 }$ +$\frac{8}{7}$ -$\frac{12}{23 }$
=$\frac{841}{2576 }$
c) ($\frac{-377}{231 }$ -$\frac{123}{89 }$ +$\frac{34}{791 }$).($\frac{1}{6 }$ -$\frac{1}{8 }$ -$\frac{1}{24 }$)
=($\frac{-377}{231 }$ -$\frac{123}{89 }$ +$\frac{34}{791 }$).0
=0
