3.25×7,.8-7.8(简便计算)(5x-4)÷5=4(解方程)5x-3x1.3=0(解方程)(x+0.5)×3=45(解方程

2024-11-28 07:32:47
推荐回答(2个)
回答1:

3.25×7,.8-7.8
=(3.25-1)×7.8
=17.55

(5x-4)÷5=4
5x-4=20
5x=24
x=4.8

5x-3x1.3=0
5x=3.9
x=0.78

(x+0.5)×3=45
x+0.5=15
x=14.5

回答2:

3.25×7,.8-7.8
=(3.25-1)×7.8
=17.55

(5x-4)÷5=4
5x-4=20
5x=24
x=4.8

5x-3x1.3=0
5x=3.9
x=0.78

(x+0.5)×3=45
x+0.5=15
x=14.5