什么给我带来了快乐-林伟贤

2020年12月18日发(作者：郎平)

解方程

分数加减法



x +

x =
26
x + x =






x + x =



x +


x =
46



+ x =








+

x =


X
-


x = 2




x - 5 =

11X
-


=











x =
9

X
-



=





x +





x =






x +

x =
20



x +

=
26


x +



x =



x -

x =




X
-


=








X
-

=










x =


11
X
-


=


1 3

5X
-




=






X
-
X
=







X
-

X
=




X
-




X
=


-
X
=






-
X
=







-
X
=





X =






X =






X =




X =








X =







-
X
=







-
X
=






-
X
=



分数乘法

X =






X =





X =






X =




=






X


X =



X =










X = 5
X =








X =



2 3

分数除法
X

X

X




X





X






X




X =




X =







X

X






X





X






X






X




X =








5X =




X =




3 3

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