Question

解方程和简便计算

解方程：
1. 5（x+4）-2x=x+48

2. 4.5-x=2x-6

3. 0.3x+7x-0.25x=21.15

能简便的要简便`不简便的要按顺序计算`（乘先减后的那些都会吧`）

1.（根据我的眼光`这道是简便的）4.68×1.1-0.468+4.68×9

2.（再根据我的眼光`这道是不简便的）[（8.73-8.23）×0.6-0.1]÷0.05

3.（还根据我的眼光`这道是简便的`）0.5×[9.9-（10-0.56÷5.6）]

4.（我不根据了`自己看着办吧`）0.01÷[（3.8+4.02）÷78.2]-0.01

Answer 1

我来算递等计算吧，呵呵～～
1. 4.68×1.1-0.468+4.68×9
=4.68×1.1-(0.468×10)+4.68×(9÷10)
=4.68×1.1-4.68+4.68×0.9
=4.68×1.1+4.68×0.9-4.68
=4.68×(1.1+0.9-1)
=4.68×1
=4.68
2. [(8.73-8.23)×0.6-0.1}÷0.05
=[0.5×0.6-0.1]÷0.05
=[0.3-0.1]÷0.05
=0.2÷0.05
=4

Answer 2

与上同样：
1. 4.68×1.1-0.468+4.68×9
=4.68×1.1-(0.468×10)+4.68×(9÷10)
=4.68×1.1-4.68+4.68×0.9
=4.68×1.1+4.68×0.9-4.68
=4.68×(1.1+0.9-1)
=4.68×1
=4.68
2. [(8.73-8.23)×0.6-0.1}÷0.05
=[0.5×0.6-0.1]÷0.05
=[0.3-0.1]÷0.05
=0.2÷0.05
=4
1. 4.68×1.1-0.468+4.68×9
=4.68×1.1-(0.468×10)+4.68×(9÷10)
=4.68×1.1-4.68+4.68×0.9
=4.68×1.1+4.68×0.9-4.68
=4.68×(1.1+0.9-1)
=4.68×1
=4.68
2. [(8.73-8.23)×0.6-0.1}÷0.05
=[0.5×0.6-0.1]÷0.05
=[0.3-0.1]÷0.05
=0.2÷0.05
=4
我不是抄的

Answer 3

1. 4.68×1.1-0.468+4.68×9
=4.68×1.1-(0.468×10)+4.68×(9÷10)
=4.68×1.1-4.68+4.68×0.9
=4.68×1.1+4.68×0.9-4.68
=4.68×(1.1+0.9-1)
=4.68×1
=4.68
2. [(8.73-8.23)×0.6-0.1}÷0.05
=[0.5×0.6-0.1]÷0.05
=[0.3-0.1]÷0.05
=0.2÷0.05
=4
别泄气

Answer 4

未知数解方程