问题
解答题
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答案
(1)
:x=3 5
:2,1 3
x=1 3
×2,3 5
x÷1 3
=1 3
÷6 5
,1 3
x=
;18 5
(2)
=8 21
,0.4 x
8x=21×0.4,
8x÷8=8.4÷8,
x=1.05;
(3)x:6.4=4:3.25,
3.25x=4×6.4,
3.25x÷3.25=25.6÷3.25,
x=
;512 65
(4)
=1.25 0.25
,x 1.6
0.25x=1.6×1.25,
0.25x÷0.25=2÷0.25,
x=8.