问题
解答题
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答案
(1)
X+0.8=5.6,3 5
X+0.8-0.8=5.6-0.8,3 5
X×3 5
=4.8×5 3
,5 3
X=8;
(2)1.4:x=1:0.75,
x=1.4×0.75,
x=1.05;
(3)1+25%x=3,
1+25%x-1=3-1,
0.25x÷0.25=2÷0.25,
x=8.
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(1)
X+0.8=5.6,3 5
X+0.8-0.8=5.6-0.8,3 5
X×3 5
=4.8×5 3
,5 3
X=8;
(2)1.4:x=1:0.75,
x=1.4×0.75,
x=1.05;
(3)1+25%x=3,
1+25%x-1=3-1,
0.25x÷0.25=2÷0.25,
x=8.