解比例 2⼀8=9⼀x 1⼀2:1⼀5=1⼀4:x 1.25⼀0.25=x⼀1.6 40:x=2.5:15 1⼀2:x=5:16 3⼀4:1⼀5=20:x

2024-11-15 21:25:57
推荐回答(2个)
回答1:

2/8=9/x
2x=72
x=36
1/2:1/5=1/4:x
1/2x=1/20
x=1/10
1.25/0.25=x/1.6
1.25*1.6=0.25*x
x=8
40:x=2.5:15
2.5*x=40*15
2.5x=600
x=240
1/2:x=5:16
5x=1/2*16
x=1.6
3/4:1/5=20:x
3/4x=20*1/5
x=16/3

回答2:

2/8=9/x
2x=72
x=36
1/2:1/5=1/4:x
1/5 X 1/4=1/2 X x
1/2x=1/20
x=1/10
1.25/0.25=x/1.6
0.25x=1.25 X 1.6
0.25x=2
x=8
40:x=2.5:15
2.5x=40X15
2.5x=600
x=240
1/2:x=5:16
0.5:x=5:16
5x=16X0.5
5x=8
x=1.6
3/4:1/5=20:x
3/4x=1/5 X 20
3/4 x=4
x=4 X 4/3
x=16/3