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1. 计算下列各题。
$(\frac{1}{6}+\frac{4}{5})×15$
$\frac{2}{3}÷(\frac{1}{6}+\frac{4}{9})$
$40÷[(\frac{3}{8}+\frac{2}{3})×\frac{3}{25}]$
$(\frac{1}{6}+\frac{4}{5})×15$
$\frac{2}{3}÷(\frac{1}{6}+\frac{4}{9})$
$40÷[(\frac{3}{8}+\frac{2}{3})×\frac{3}{25}]$
答案
1. $\frac{29}{2}$
2. $\frac{12}{11}$
3. 320
2. $\frac{12}{11}$
3. 320
2. 计算下列各题。
$6÷(\dfrac{6}{7}+\dfrac{12}{5})$
$4÷(\dfrac{5}{6}-\dfrac{3}{4})$
$(\dfrac{5}{6}+\dfrac{7}{8})×24×2$
$6÷(\dfrac{6}{7}+\dfrac{12}{5})$
$4÷(\dfrac{5}{6}-\dfrac{3}{4})$
$(\dfrac{5}{6}+\dfrac{7}{8})×24×2$
答案
1. $\frac{35}{19}$
2. 48
3. 82
2. 48
3. 82
