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第24頁

信息發(fā)布者：

$\frac{1}{3}$

$3\frac{3}{4}$

$\frac{7}{15}$

21.98

$1\frac{3}{5}$

$\frac{4}{9}$

$\frac{2}{3}$

$\frac{8}{15}$

$1\frac{7}{30}$

$\frac 38$

$\frac{7}{24}$

$\frac{1}{8}$

$1\frac{7}{12}$

$1\frac{1}{15}$

?$\frac 47$?

$2\frac{2}{5}$

$\frac{5}{6}$

解: x-0.4 =

x-0.4+0.4 =

1+0.4

x =

1.4

解: 0.6x =

0.6x÷0.6 =

30÷0.6

x =

解: 3x+9 =

3x+9-9 =

21-9

3x =

3x÷3 =

12÷3

x =

解: 5.6x÷0.7×0.7 =

32×0.7

5.6x =

22.4

5.6x÷5.6 =

22.4÷5.6

x =

解: 4.5x-13 =

4.5x-13+13 =

32+13

4.5x =

4.5x÷4.5 =

45÷4.5

x =

解: 11.2x-22.4 =

11.2x-22.4+22.4 =

42+22.4

11.2x =

64.4

11.2x÷11.2 =

64.4÷11.2

x =

5.75

$\begin{aligned}解：x-4&=\frac {7}{8}\\x&=\frac {39}{8}\end{aligned}$

$\begin{aligned}解：x-\frac {1}{6}&=\frac {5}{6}\\x&=1\end{aligned}$

解: 5x+1 =

5x =

x =

12.8

?$\begin{aligned}解：0.2x&=\frac {5}{8}+\frac {3}{8}\\0.2x&=1\\x&=5\end{aligned}$?

$\begin{aligned}解：\frac {7}{12}+x&=\frac {2}{3}\\x&=\frac {1}{12}\end{aligned}$

$\begin{aligned}解：x-\frac {19}{12}&=\frac {1}{2}\\x&=\frac {25}{12}\end{aligned}$

＞

＜

＞

＜

?$=\frac {1}{20}+\frac {1}{10}$?

?$=\frac {3}{20}$?

?$=\frac {9}{8}-\frac {1}{6}$?

?$=\frac {23}{24}$?

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第24頁