1.1-(6/20+6/15)=18/60=3/20
(3/20)/(1/10)=1.5(h)
2.(8*26-0)/(8+5)=16
26-16=10
3.(276+300)/18=32(m/s)
32/(5+3)=4(m/s)
4*5=20(m/s)甲
4*3=12(m/s)乙
4.假设它为abcabc
abcabc=abc*1001
=abc*7*11*13
1.1-(6/20+6/15)=18/60=3/20
(3/20)/(1/10)=1.5(h)
2.(8*26-0)/(8+5)=16
26-16=10
3.(276+300)/18=32(m/s)
32/(5+3)=4(m/s)
4*5=20(m/s)甲
4*3=12(m/s)乙
4.假设它为abcabc
abcabc=abc*1001
=abc*7*11*13