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解比例x:38=23:46x=27x:0.3=0.4:0.80解比例x:38=23:46x=27x:0.3=0.4:0.80.751.5=x6.
题目详情
解比例x:38=23:46x=27x:0.3=0.4:0.80
解比例
x:
=
:4
=
x:0.3=0.4:0.8
=
.
解比例
x:
3 |
8 |
2 |
3 |
6 |
x |
2 |
7 |
x:0.3=0.4:0.8
0.75 |
1.5 |
x |
6 |
▼优质解答
答案和解析
解(1)x:
=
:4
4x=
×
4x=
x=
÷4
x=
(2)
=
2x=6×7
2x=42
x=42÷2
x=21
(3)x:0.3=0.4:0.8
0.8x=0.3×0.4
0.8x=0.12
x=0.12÷0.8
x=0.15
(4)
=
1.5x=0.75×6
1.5x=4.5
x=4.5÷1.5
x=3
3 |
8 |
2 |
3 |
4x=
3 |
8 |
2 |
3 |
4x=
1 |
4 |
x=
1 |
4 |
x=
1 |
16 |
(2)
6 |
x |
2 |
7 |
2x=6×7
2x=42
x=42÷2
x=21
(3)x:0.3=0.4:0.8
0.8x=0.3×0.4
0.8x=0.12
x=0.12÷0.8
x=0.15
(4)
0.75 |
1.5 |
x |
6 |
1.5x=0.75×6
1.5x=4.5
x=4.5÷1.5
x=3
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