问题
解答题
解方程或解比例:
|
答案
(1)42-6Χ=15.6,
42-6Χ+6x=15.6+6x,
42-15.6=15.6+6x-15.6,
26.4=6x,
26.4÷6=6x÷6,
x=4.4;
(2)Χ:0.2=
:0.8,2 3
0.8x=0.2×
,2 3
0.8x÷0.8=
÷0.8,2 15
x=
.1 6
解方程或解比例:
|
(1)42-6Χ=15.6,
42-6Χ+6x=15.6+6x,
42-15.6=15.6+6x-15.6,
26.4=6x,
26.4÷6=6x÷6,
x=4.4;
(2)Χ:0.2=
:0.8,2 3
0.8x=0.2×
,2 3
0.8x÷0.8=
÷0.8,2 15
x=
.1 6