Đáp án:$\frac{-97}{15}$
Giải thích các bước giải:
A= ( 3 - 1/4 + 2/3 ) - (5 + 1/3 - 6/5 ) - ( 6 - 7/4 + 3/2 )
= 3 - $\frac{1}{4}$ + $\frac{2}{3}$ - 5 -$\frac{1}{3}$ + $\frac{6}{5}$ -6 + $\frac{7}{4}$ - $\frac{3}{2}$
= (3-5-6) + ( $\frac{-1}{4}$ + $\frac{7}{4}$ ) + ( $\frac{2}{3}$ - $\frac{1}{3}$ ) + $\frac{6}{5}$ + $\frac{-3}{2}$
= -8 + $\frac{3}{2}$ + $\frac{1}{3}$ + $\frac{6}{5}$ + $\frac{-3}{2}$
= -8 + ( $\frac{3}{2}$ + $\frac{-3}{2}$ ) + $\frac{6}{5}$ + $\frac{1}{3}$
= -8 + $\frac{6}{5}$ + $\frac{1}{3}$
=$\frac{-34}{5}$ + $\frac{1}{3}$
=$\frac{-97}{15}$
@Nguyenbatdiet
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