第33页

信息发布者:
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$\dfrac{2}{35}$
$\dfrac{20}{3}$
$\dfrac{128}{35}$
$\dfrac{28}{15}$
​$\frac {16}{35}÷8$​
​$ =\frac {16}{35}×\frac {1}{8}$​
​$ =\frac {2}{35}$​
​$5÷\frac {3}{4}$​
​$ =5×\frac {4}{3}$​
​$ =\frac {20}{3}$​
​$\frac {16}{35}÷\frac {1}{8}$​
​$ =\frac {16}{35}×8$​
​$ =\frac {128}{35}$​
​$\frac {4}{3}÷\frac {5}{7}$​
​$ =\frac {4}{3}×\frac {7}{5}$​
​$ =\frac {28}{15}$​
5
$\dfrac{1}{5}$
5
$\dfrac{1}{5}$
等式两边同时乘同一个数,等式仍然成立
$8×\dfrac{1}{5}$
$x$
$8×\dfrac{1}{5}$
等量代换
$\dfrac{4}{9} ÷ \dfrac{3}{7}$
$= (\dfrac{4}{9} × \dfrac{7}{3}) ÷ (\dfrac{3}{7} × \dfrac{7}{3})$
$= (\dfrac{4}{9} × \dfrac{7}{3}) ÷ 1$
$= \dfrac{4}{9} × \dfrac{7}{3}$