求未知数X.X÷0.4=0.625&n
求未知数X.X÷0.4=0.625X:15=18:11034X-23X=16....
求未知数X.X÷0.4=0.625 X:15=18:11034X-23X=16.
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氦筧鋔成墱澾
推荐于2016-04-14
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(1)X÷0.4=0.625,
X÷0.4×0.4=0.625×0.4,
X=0.25;
(2)X:
=
:
,
X=
×
,
X÷
=
×
÷
,
X=
×
×10,
X=
;
(3)
X-
X=
,
X=
,
X÷
=
÷
,
X=2.
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