脱式计算。
$24 ÷ \frac{1}{3} - 56$ $(\frac{6}{35} + \frac{4}{21}) ÷ \frac{4}{7}$ $\frac{8}{14} ÷ 4 × \frac{2}{7}$
$ \frac{49}{5} × \frac{7}{8} ÷ 7$ $\frac{7}{24} ÷ \frac{13}{72} ÷ \frac{7}{5}$ $\frac{3}{4} ÷ \frac{9}{14} - \frac{3}{4} × \frac{5}{9}$
$(\frac{5}{2} + \frac{2}{3}) ÷ (2 - \frac{1}{3} × \frac{5}{4})$ $4 - \frac{21}{32} ÷ \frac{7}{16} - \frac{5}{8}$
$24 ÷ \frac{1}{3} - 56$ $(\frac{6}{35} + \frac{4}{21}) ÷ \frac{4}{7}$ $\frac{8}{14} ÷ 4 × \frac{2}{7}$
$ \frac{49}{5} × \frac{7}{8} ÷ 7$ $\frac{7}{24} ÷ \frac{13}{72} ÷ \frac{7}{5}$ $\frac{3}{4} ÷ \frac{9}{14} - \frac{3}{4} × \frac{5}{9}$
$(\frac{5}{2} + \frac{2}{3}) ÷ (2 - \frac{1}{3} × \frac{5}{4})$ $4 - \frac{21}{32} ÷ \frac{7}{16} - \frac{5}{8}$
答案:
$16 \frac{19}{30} \frac{2}{49} \frac{49}{40} \frac{15}{13} \frac{3}{4} 2\frac{15}{8}$
1. 下列计算正确吗?请把错误的改正过来。
(1)$\frac{1}{4} + \frac{5}{8} ÷ \frac{1}{4} + \frac{5}{8}$
$= \frac{7}{8} ÷ \frac{7}{8}$
$= 1$
(2)$\frac{3}{5} × \frac{1}{3} ÷ \frac{3}{5} × \frac{1}{3}$
$ = \frac{1}{5} ÷ \frac{1}{5}$
$ = 1$
(1)$\frac{1}{4} + \frac{5}{8} ÷ \frac{1}{4} + \frac{5}{8}$
$= \frac{7}{8} ÷ \frac{7}{8}$
$= 1$
(2)$\frac{3}{5} × \frac{1}{3} ÷ \frac{3}{5} × \frac{1}{3}$
$ = \frac{1}{5} ÷ \frac{1}{5}$
$ = 1$
答案:
$1.(1) × \frac{27}{8} (2) × \frac{1}{9}$
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