1, 9/5*4/3*5/4=3(吨)
2, 8/(1-5/15)=12(天)
3, 5*5*5/(25*1/3 )=15cm
4, 设甲x‘则乙0.8x
(x-2):(0.8x+2)=8:7
x=50 0.8x=40
5,设相距为x
24*3=0.1x+30
x=420
6, (72.6+72.6-2.4)*2-34.5=251.1
1, 9/5*4/3*5/4=3(吨)
2, 8/(1-5/15)=12(天)
3, 5*5*5/(25*1/3 )=15cm
4, 设甲x‘则乙0.8x
(x-2):(0.8x+2)=8:7
x=50 0.8x=40
5,设相距为x
24*3=0.1x+30
x=420
6, (72.6+72.6-2.4)*2-34.5=251.1