6.5:x=0.5:4 x:0.42=7:21 1/8:1/6=1/10:x 6/2.5=x/3 3/2:1/3=x:8 x:9/2=1/3:2 (解比例)6.5:x=0.5:4 x:0.42=7:21 1/8:1/6=1/10:x 6/2.5=x/3 3/2:1/3=x:8 x:9/2=1/3:2 (解比例)
6.5:x=0.5:4 x:0.42=7:21 1/8:1/6=1/10:x 6/2.5=x/3 3/2:1/3=x:8 x:9/2=1/3:2 (解比例)
6.5:x=0.5:4 x:0.42=7:21 1/8:1/6=1/10:x 6/2.5=x/3 3/2:1/3=x:8 x:9/2=1/3:2 (解比例)
6.5:x=0.5:4
x=4*6.5/0.5=52
x:0.42=7:21
x=7*0.42/21=0.14
1/8:1/6=1/10:x
x=(1/6)*(1/10)/(1/8)=2/15
6/2.5=x/3
x=6*3/2.5=7.2
3/2:1/3=x:8
x=(3/2)*8/(1/3)=36
x:9/2=1/3:2
x=(1/3)*(9/2)/2=3/4