$(1) \frac{4}{9} ÷ \frac{6}{7} = \frac{4}{9} × (\ \ \ \ \ ) = (\ \ \ \ \ )$
$\frac{2}{5} ÷ \frac{3}{8} = \frac{2}{5} × (\ \ \ \ \ ) = (\ \ \ \ \ )$
$\frac{2}{5} ÷ \frac{3}{8} = \frac{2}{5} × (\ \ \ \ \ ) = (\ \ \ \ \ )$
答案
(1)$\frac{7}{6}$ $\frac{14}{27}$ $\frac{8}{3}$ $\frac{16}{15}$
$(2)$一种脱粒机$ \frac{3}{10} $小时脱粒$ \frac{4}{5} $吨,平均每小时脱粒多少吨$?$列式为$( ),$结果是$( )$吨。每脱粒$1$吨需要多少小时$?$列式为$( ),$结果是$( )$小时。
答案
(2)$\frac{4}{5}÷\frac{3}{10}$ $\frac{8}{3}$ $\frac{3}{10}÷\frac{4}{5}$ $\frac{3}{8}$
$(3)$求$ \frac{1}{2} $是$ \frac{1}{8} $的多少倍,正确列式是$( ),$结果是$( )。
答案
(3)$\frac{1}{2}÷\frac{1}{8}$ 4
2. 计算。
$ \frac{6}{5} ÷ \frac{4}{7} $$ $$ \frac{1}{4} ÷ \frac{3}{8} $$ $$ \frac{3}{4} ÷ \frac{4}{7} $
$ \frac{1}{4} ÷ \frac{1}{5} $$ $$ \frac{10}{3} ÷ \frac{8}{25} $$ $$ \frac{3}{4} ÷ \frac{7}{8} $
$ \frac{6}{5} ÷ \frac{4}{7} $$ $$ \frac{1}{4} ÷ \frac{3}{8} $$ $$ \frac{3}{4} ÷ \frac{4}{7} $
$ \frac{1}{4} ÷ \frac{1}{5} $$ $$ \frac{10}{3} ÷ \frac{8}{25} $$ $$ \frac{3}{4} ÷ \frac{7}{8} $
答案
2.$\frac{21}{10}$ $\frac{2}{3}$ $\frac{21}{16}$ $\frac{5}{4}$ $\frac{125}{12}$ $\frac{6}{7}$
解析
$\frac{6}{5} ÷ \frac{4}{7} = \frac{6}{5} × \frac{7}{4} = \frac{21}{10}$
$\frac{1}{4} ÷ \frac{3}{8} = \frac{1}{4} × \frac{8}{3} = \frac{2}{3}$
$\frac{3}{4} ÷ \frac{4}{7} = \frac{3}{4} × \frac{7}{4} = \frac{21}{16}$
$\frac{1}{4} ÷ \frac{1}{5} = \frac{1}{4} × 5 = \frac{5}{4}$
$\frac{10}{3} ÷ \frac{8}{25} = \frac{10}{3} × \frac{25}{8} = \frac{125}{12}$
$\frac{3}{4} ÷ \frac{7}{8} = \frac{3}{4} × \frac{8}{7} = \frac{6}{7}$
$\frac{1}{4} ÷ \frac{3}{8} = \frac{1}{4} × \frac{8}{3} = \frac{2}{3}$
$\frac{3}{4} ÷ \frac{4}{7} = \frac{3}{4} × \frac{7}{4} = \frac{21}{16}$
$\frac{1}{4} ÷ \frac{1}{5} = \frac{1}{4} × 5 = \frac{5}{4}$
$\frac{10}{3} ÷ \frac{8}{25} = \frac{10}{3} × \frac{25}{8} = \frac{125}{12}$
$\frac{3}{4} ÷ \frac{7}{8} = \frac{3}{4} × \frac{8}{7} = \frac{6}{7}$
$3. $把$ \frac{4}{5} $升橙汁全部倒入容量为$ \frac{1}{5} $升的小瓶里,可以倒满几瓶$?$
答案
3.4瓶
解析
$\frac{4}{5} ÷ \frac{1}{5} = 4$
4瓶
4瓶
$4. $一根绳子长$ \frac{1}{2} $米,平均剪成$ \frac{1}{6} $米长的小段,可以剪几段$?$平均剪成$ \frac{1}{4} $米长的小段,可以剪几段$?$
答案
4.3段 2段
解析
$\frac{1}{2} ÷ \frac{1}{6} = 3$段
$\frac{1}{2} ÷ \frac{1}{4} = 2$段
$\frac{1}{2} ÷ \frac{1}{4} = 2$段
1. 在$$ ◯ $$里填“>”“<”或“=”。
$ \frac{5}{9} × \frac{1}{2} ◯ \frac{5}{9} $$ $$ \frac{5}{9} × 3 ◯ \frac{5}{9} $$ $$ \frac{5}{9} ÷ 1 ◯ \frac{5}{9} $
$ \frac{5}{9} ÷ \frac{1}{2} ◯ \frac{5}{9} $$ $$ \frac{5}{9} ÷ 3 ◯ \frac{5}{9} $$ $$ 1 ÷ \frac{5}{9} ◯ \frac{5}{9} $
$ \frac{5}{9} × \frac{1}{2} ◯ \frac{5}{9} $$ $$ \frac{5}{9} × 3 ◯ \frac{5}{9} $$ $$ \frac{5}{9} ÷ 1 ◯ \frac{5}{9} $
$ \frac{5}{9} ÷ \frac{1}{2} ◯ \frac{5}{9} $$ $$ \frac{5}{9} ÷ 3 ◯ \frac{5}{9} $$ $$ 1 ÷ \frac{5}{9} ◯ \frac{5}{9} $
答案
1.< > = > < >
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