登录
1. 直接写出得数。
$\frac{2}{9} ÷ \frac{2}{5} =$
$\frac{7}{12} ÷ \frac{1}{3} =$
$\frac{2}{13} ÷ \frac{4}{7} =$
$\frac{10}{11} ÷ \frac{5}{6} =$
$12 ÷ \frac{3}{4} =$
$\frac{5}{8} ÷ \frac{5}{6} =$
$\frac{14}{15} ÷ 2 =$
$\frac{7}{9} ÷ \frac{5}{18} =$
$\frac{33}{5} × \frac{2}{11} =$
$\frac{8}{3} × \frac{3}{7} =$
$\frac{1}{15} ÷ \frac{3}{5} =$
$\frac{7}{12} × \frac{3}{5} =$
$\frac{2}{9} ÷ \frac{2}{5} =$
$\frac{7}{12} ÷ \frac{1}{3} =$
$\frac{2}{13} ÷ \frac{4}{7} =$
$\frac{10}{11} ÷ \frac{5}{6} =$
$12 ÷ \frac{3}{4} =$
$\frac{5}{8} ÷ \frac{5}{6} =$
$\frac{14}{15} ÷ 2 =$
$\frac{7}{9} ÷ \frac{5}{18} =$
$\frac{33}{5} × \frac{2}{11} =$
$\frac{8}{3} × \frac{3}{7} =$
$\frac{1}{15} ÷ \frac{3}{5} =$
$\frac{7}{12} × \frac{3}{5} =$
答案
$\frac{5}{9}$ $\frac{7}{4}$ $\frac{7}{26}$ $\frac{12}{11}$ 16 $\frac{3}{4}$ $\frac{7}{15}$ $\frac{14}{5}$ $\frac{6}{5}$ $\frac{8}{7}$ $\frac{1}{9}$ $\frac{7}{20}$
2. 先画一画、涂一涂，再算一算。
$\frac{2}{5}×\frac{2}{3}=$
$6÷\frac{3}{4}=$
$\frac{2}{5}×\frac{2}{3}=$
$6÷\frac{3}{4}=$
答案
(1)$\frac{4}{15}$
(2)8
3. 递等式计算。
$5.8÷2.5÷0.4$
$6.34×0.75+0.366×7.5$
$1.25×3.2×25$
$\frac{4}{25}×$
$-\frac{4}{25}$
$5.8÷2.5÷0.4$
$6.34×0.75+0.366×7.5$
$1.25×3.2×25$
$\frac{4}{25}×$
$-\frac{4}{25}$答案
5.8 7.5 100 16
1)妈妈今年x岁，女儿比妈妈小24岁，女儿今年(
x-24
)岁。答案
x-24
(2)每天看a页书，看了7天，一共看了(
7a
)页，还剩b页没看，这本书共(7a+b
)页。答案
7a；7a+b
(3)用小棒摆正方形(如图)，摆4个正方形需要(
13
)根小棒，摆n个正方形需要(3n+1
)根小棒。答案
13；3n+1
