1. 解方程。
$2x= \frac{1}{4}$ $x÷\frac{4}{9}= \frac{3}{4}$
$x= $
$\frac{1}{2}x= 4$ $\frac{1}{3}x= 0$
$x= $
$\frac{2}{3}x= \frac{4}{9}$ $\frac{2}{5}x= 4$
$x= $
$2x= \frac{1}{4}$ $x÷\frac{4}{9}= \frac{3}{4}$
$x= $
$\frac{1}{8}$
$x= $$\frac{1}{3}$
$\frac{1}{2}x= 4$ $\frac{1}{3}x= 0$
$x= $
$8$
$x= $$0$
$\frac{2}{3}x= \frac{4}{9}$ $\frac{2}{5}x= 4$
$x= $
$\frac{2}{3}$
$x= $$10$
答案:
$2x=\frac{1}{4}$
$x=\frac{1}{4}÷2$
$x=\frac{1}{4}×\frac{1}{2}$
$x=\frac{1}{8}$
$x÷\frac{4}{9}=\frac{3}{4}$
$x=\frac{3}{4}×\frac{4}{9}$
$x=\frac{1}{3}$
$\frac{1}{2}x=4$
$x=4÷\frac{1}{2}$
$x=4×2$
$x=8$
$\frac{1}{3}x=0$
$x=0÷\frac{1}{3}$
$x=0$
$\frac{2}{3}x=\frac{4}{9}$
$x=\frac{4}{9}÷\frac{2}{3}$
$x=\frac{4}{9}×\frac{3}{2}$
$x=\frac{2}{3}$
$\frac{2}{5}x=4$
$x=4÷\frac{2}{5}$
$x=4×\frac{5}{2}$
$x=10$
$\frac{1}{8}$;$\frac{1}{3}$;$8$;$0$;$\frac{2}{3}$;$10$
$x=\frac{1}{4}÷2$
$x=\frac{1}{4}×\frac{1}{2}$
$x=\frac{1}{8}$
$x÷\frac{4}{9}=\frac{3}{4}$
$x=\frac{3}{4}×\frac{4}{9}$
$x=\frac{1}{3}$
$\frac{1}{2}x=4$
$x=4÷\frac{1}{2}$
$x=4×2$
$x=8$
$\frac{1}{3}x=0$
$x=0÷\frac{1}{3}$
$x=0$
$\frac{2}{3}x=\frac{4}{9}$
$x=\frac{4}{9}÷\frac{2}{3}$
$x=\frac{4}{9}×\frac{3}{2}$
$x=\frac{2}{3}$
$\frac{2}{5}x=4$
$x=4÷\frac{2}{5}$
$x=4×\frac{5}{2}$
$x=10$
$\frac{1}{8}$;$\frac{1}{3}$;$8$;$0$;$\frac{2}{3}$;$10$
(1)(
(2)(
$\frac{4}{5}$
)÷(3
)= ($\frac{4}{15}$
)(2)(
60
)÷($\frac{2}{3}$
)= (90
)(千米)
答案:
(1) $\frac{4}{5} ÷ 3 = \frac{4}{15}$
(2) $60 ÷ \frac{2}{3} = 90$
(1) $\frac{4}{5} ÷ 3 = \frac{4}{15}$
(2) $60 ÷ \frac{2}{3} = 90$
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