解方程或比例 4X-2.4×3=2 3 4 X÷ 2 3 = 1 6 0.4:0.25=

解方程或比例 4X-2.4×3=2 3 4 X÷ 2 3 = 1 6 0.4:0.25= 12 X .
2024-12-26 13:56:42
推荐回答(1个)
回答1:


(1)4X-2.4×3=2,
4X-7.2=2,
4X-7.2+7.2=2+7.2,
4X=9.2,
4X÷4=9.2÷4,
X=2.3;

(2)
3
4
2
3
=
1
6

9
8
X=
1
6

9
8
9
8
=
1
6
÷
9
8

X=
4
27


(3)0.4:0.25=
12
X

0.4X=0.25×12,
0.4X=3,
0.4X÷0.4=3÷0.4,
X=7.5.