问题
解答题
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答案
(1)x÷4=56,
x÷4×4=56×4,
x=224;
(2)
x-2 3
=1 2
,1 3
x-2 3
+1 2
=1 2
+1 3
,1 2
x=2 3
,5 6
x2 3
=2 3
÷5 6
,2 3
x=
;5 4
(3)
:x=5:0.4,1 4
5x=
×0.4,1 4
5x=0.1,
5x÷5=0.1÷5,
x=0.02.