15-4又2/5-5又3/5 2又1/2+x=11 1/4-x=1/10= = == = == = =简便计算 (解方程)

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15-4又2/5-5又3/5 2又1/2+x=11 1/4-x=1/10= = == = == = =简便计算 (解方程)

15-4又2/5-5又3/5 2又1/2+x=11 1/4-x=1/10= = == = == = =简便计算 (解方程)
15-4又2/5-5又3/5 2又1/2+x=11 1/4-x=1/10
= = =
= = =
= = =
简便计算 (解方程)

15-4又2/5-5又3/5 2又1/2+x=11 1/4-x=1/10= = == = == = =简便计算 (解方程)
15-4又2/5-5又3/5
=15-(4又2/5+5又3/5)
=15-10
=5
2又1/2+x=11
x=11-2.5
x=8.5
1/4-x=1/10
x=1/4-1/10
x=3/20

15-(4.4+5.6)=5
X=11-2.5=8.5
0.25-0.1=x x=0.15

15-(4+5)-(2/5+3/5 )=15-9-1=5
x=8.5
x=3/20

15-(4又2/5+5又3/5)=15-10=5,x=11-2又1/2=8又1/2,x=1/4-1/10=3/20

30/2-13/2-28/5=49/10
17/2
3/20望采纳一下