小升初暑假知识训练之复习连：分数四则混合运算

$\frac{5}{6}-5÷18-\frac{1}{18}$         $12-\frac{3}{8}-\frac{5}{8}$           $\frac{2}{9}+\frac{3}{4}+\frac{7}{9}+0.25$

3－$\frac{2}{9}$＋$\frac{1}{3}$                      $\frac{29}{24}$－（$\frac{4}{9}$＋$\frac{5}{24}$） 

$\frac{5}{7}$＋$\frac{3}{4}$＋$\frac{2}{7}$＋$\frac{1}{4}$              $\frac{9}{5}$－（$\frac{2}{7}$＋$\frac{4}{5}$）－$\frac{4}{7}$

$\frac{7}{8}-\text{（}\frac{7}{8}-\frac{3}{4}\text{）}$              $\frac{2}{9}+\frac{5}{8}+\frac{7}{9}+\frac{3}{8}$                  $\frac{3}{16}+0\mathrm{.}5-\frac{2}{5}+1\frac{13}{16}$

$\frac{4}{7}+\frac{5}{12}+\frac{4}{7}+\frac{1}{12}$                 $\frac{2}{3}+\left(\frac{5}{18}-\frac{1}{6}\right)$

$\frac{5}{6}-\frac{5}{12}+\frac{1}{3}$                     $\frac{7}{8}+\frac{3}{5}+\left(\frac{1}{4}+\frac{2}{5}\right)$

$\frac{5}{13}+\frac{1}{6}+\frac{8}{13}+\frac{5}{6}$               $\frac{1}{5}+\frac{2}{9}\times \frac{3}{10}$

$\frac{7}{36}\times \frac{20}{21}+\frac{5}{9}$                  $\frac{17}{20}-\frac{1}{4}-\frac{7}{20}$

$\frac{2}{3}+\frac{1}{2}-\frac{1}{5}$            $\frac{11}{12}-\left(\frac{1}{6}+\frac{1}{8}\right)$           $\frac{3}{11}-\frac{13}{17}+\frac{8}{11}-\frac{4}{17}$

$\frac{1}{4}+\frac{1}{6}+\frac{3}{8}$              $\frac{15}{2}-\frac{1}{7}-\frac{6}{7}$            $\frac{3}{14}-\frac{1}{4}+\frac{11}{14}-\frac{3}{4}$

$\left(\frac{8}{9}+\frac{4}{27}\right)\times 27$              $\frac{11}{50}+\frac{3}{8}+\frac{39}{50}+\frac{5}{8}$              $\frac{5}{12}\times 11+\frac{5}{12}$

$\mathrm{①}\frac{2}{5}\times 4\times \frac{3}{4}$                 $\mathrm{②}\left(13-\frac{2}{5}\right)÷\frac{7}{15}$             $\mathrm{③}\left(\frac{1}{4}+\frac{2}{9}\right)\times 3.6$ 

$\mathrm{④}\left(3-\frac{6}{11}-\frac{5}{11}\right)÷\frac{1}{4}$                                           $\mathrm{⑤}20÷\left[\frac{1}{7}\times \left(\frac{1}{2}+\frac{3}{8}\right)\right]$ 

①$\frac{5}{8}÷\frac{3}{4}\times \frac{8}{15}$

②$\frac{5}{6}+\frac{2}{3}\times \frac{3}{4}$

③$\frac{13}{11}\times \frac{7}{9}-\frac{2}{11}\times \frac{7}{9}$

$\frac{7}{10}\times \frac{4}{7}÷\frac{4}{15}$                 $\frac{1}{9}÷8+\frac{1}{8}\times \frac{7}{9}$  

$\frac{4}{9}÷\left[\left(\frac{4}{5}+\frac{2}{3}\right)\times \frac{5}{11}\right]$           $\left(\frac{1}{2}+\frac{5}{8}\right)÷\frac{3}{4}+\frac{1}{4}$

$\frac{5}{9}\times \frac{5}{8}+\frac{4}{9}÷\frac{8}{5}$                $\left(\frac{17}{18}-\frac{3}{4}+\frac{1}{6}\right)\times 36$

$\left(\frac{3}{7}-\frac{1}{12}\right)\times 7-\frac{5}{12}$              $\frac{5}{14}÷\left[\frac{6}{11}\times \left(\frac{4}{9}+\frac{1}{6}\right)\right]$

⑴$\mathrm{[}\frac{1}{2}-\text{（}\frac{3}{4}-\frac{3}{5}\text{）}\mathrm{]}÷\frac{7}{10}$            ⑵ $\begin{array}{l}\\ \text{（}\frac{5}{12}+\frac{4}{15}-\frac{1}{2}\text{）}\times 60\\ \\ \end{array}$

⑶ $\begin{array}{l}\\ 2\mathrm{.}42÷\frac{3}{4}+4\mathrm{.}58\times 1\frac{1}{3}-4÷3\\ \\ \end{array}$      ⑷$\begin{array}{l}9\frac{4}{5}+99\frac{4}{5}+999\frac{4}{5}+9999\frac{4}{5}\\ \end{array}$

 $\frac{8}{9}$×（$\frac{7}{16}$－$\frac{1}{4}$）÷$\frac{1}{2}$                     （$\frac{2}{27}\text{-}\frac{1}{15}$）×27×15

$\frac{1}{17}$＋（$\frac{5}{8}$＋$\frac{2}{17}$）×8                    $999\frac{8}{9}+99\frac{8}{9}+9\frac{8}{9}+\frac{1}{3}$