4.直接写得数。
$\frac{1}{4}÷\frac{1}{12}=$
$\frac{1}{3}÷12=$
$\frac{2}{5}÷\frac{2}{3}=$
$5÷\frac{1}{11}=$
$1÷\frac{3}{5}=$
$\frac{4}{11}÷32=$
$\frac{10}{3}÷\frac{3}{10}=$
$12×\frac{4}{3}=$
$\frac{1}{15}÷\frac{6}{5}=$
$\frac{1}{4}÷\frac{1}{12}=$
3
$\frac{1}{3}÷12=$
$\frac{1}{36}$
$\frac{2}{5}÷\frac{2}{3}=$
$\frac{3}{5}$
$5÷\frac{1}{11}=$
55
$1÷\frac{3}{5}=$
$\frac{5}{3}$
$\frac{4}{11}÷32=$
$\frac{1}{88}$
$\frac{10}{3}÷\frac{3}{10}=$
$\frac{100}{9}$
$12×\frac{4}{3}=$
16
$\frac{1}{15}÷\frac{6}{5}=$
$\frac{1}{18}$
答案
3
$\frac{1}{36}$
$\frac{3}{5}$
55
$\frac{5}{3}$
$\frac{1}{88}$
$\frac{100}{9}$
16
$\frac{1}{18}$
$\frac{1}{36}$
$\frac{3}{5}$
55
$\frac{5}{3}$
$\frac{1}{88}$
$\frac{100}{9}$
16
$\frac{1}{18}$
5.脱式计算。
$\frac{9}{15}÷\frac{9}{10}÷\frac{4}{3}$
$\frac{5}{6}×\frac{3}{5}÷\frac{5}{6}$
$\frac{6}{11}÷\frac{5}{11}×\frac{5}{6}$
$\frac{7}{16}÷\frac{21}{32}×\frac{2}{3}$
$\frac{9}{15}÷\frac{9}{10}÷\frac{4}{3}$
$\frac{5}{6}×\frac{3}{5}÷\frac{5}{6}$
$\frac{6}{11}÷\frac{5}{11}×\frac{5}{6}$
$\frac{7}{16}÷\frac{21}{32}×\frac{2}{3}$
答案
$\frac{9}{15}÷\frac{9}{10}÷\frac{4}{3}$
$=\frac{9}{15}×\frac{10}{9}×\frac{3}{4}$
$=\frac{2}{3}×\frac{3}{4}$
$=\frac{1}{2}$
$\frac{5}{6}×\frac{3}{5}÷\frac{5}{6}$
$=\frac{5}{6}×\frac{3}{5}×\frac{6}{5}$
$=\frac{5}{6}×\frac{6}{5}×\frac{3}{5}$
$=1×\frac{3}{5}$
$=\frac{3}{5}$
$\frac{6}{11}÷\frac{5}{11}×\frac{5}{6}$
$=\frac{6}{11}×\frac{11}{5}×\frac{5}{6}$
$=\frac{6}{5}×\frac{5}{6}$
$=1$
$\frac{7}{16}÷\frac{21}{32}×\frac{2}{3}$
$=\frac{7}{16}×\frac{32}{21}×\frac{2}{3}$
$=\frac{2}{3}×\frac{2}{3}$
$=\frac{4}{9}$
$=\frac{9}{15}×\frac{10}{9}×\frac{3}{4}$
$=\frac{2}{3}×\frac{3}{4}$
$=\frac{1}{2}$
$\frac{5}{6}×\frac{3}{5}÷\frac{5}{6}$
$=\frac{5}{6}×\frac{3}{5}×\frac{6}{5}$
$=\frac{5}{6}×\frac{6}{5}×\frac{3}{5}$
$=1×\frac{3}{5}$
$=\frac{3}{5}$
$\frac{6}{11}÷\frac{5}{11}×\frac{5}{6}$
$=\frac{6}{11}×\frac{11}{5}×\frac{5}{6}$
$=\frac{6}{5}×\frac{5}{6}$
$=1$
$\frac{7}{16}÷\frac{21}{32}×\frac{2}{3}$
$=\frac{7}{16}×\frac{32}{21}×\frac{2}{3}$
$=\frac{2}{3}×\frac{2}{3}$
$=\frac{4}{9}$
6.解方程。
$x÷\frac{14}{15}= \frac{1}{7}$
$6x= \frac{7}{8}÷\frac{1}{2}$
$x÷\frac{14}{15}= \frac{1}{7}$
$6x= \frac{7}{8}÷\frac{1}{2}$
答案
解:$x=\frac 17×\frac {14}{15}$
$ x=\frac 2{15}$
解:$6x=\frac 74$
$ x=\frac 7{24}$
$ x=\frac 2{15}$
解:$6x=\frac 74$
$ x=\frac 7{24}$
7.列方程解答。
(1)
(2)
(1)
(2)
答案
解:$\frac 56x=25$
$ x=25÷\frac 56$
x=30
解:$\frac 56x=40$
$ x=40÷\frac 56$
x=48
$ x=25÷\frac 56$
x=30
解:$\frac 56x=40$
$ x=40÷\frac 56$
x=48
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