ineedkathy
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共回答了25个问题采纳率:92% 举报
(1)
1
8 X-1=0.2,
1
8 X-1+1=0.2+1,
1
8 X=1.2,
1
8 X÷
1
8 =1.2÷
1
8
X=9.6,
(2)X:
5
14 =21:
5
8 ,
5
8 X=
5
14 ×21,
5
8 X÷
5
8 =
5
14 ×21÷
5
8 ,
X=
5
14 ×21×
8
5 ,
X=12;
(3) x:0.4=
3
10 :
12
5 ,
12
5 x=0.4×
3
10 ,
12
5 x÷
12
5 =0.4×
3
10 ÷
12
5 ,
x=0.4×
3
10 ×
5
12 ,
x=
1
20 .
1年前
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