1.解:(1)原式=0;
(2)原式=(- 1/2)X(-4)=2;
(3)原式=(- 5/4)×4=-5
(4)原式=4/7×(-1/12)=-1/21;
(5)原式=(-378)×(-1/7)×(-1/9)=-(378×1/7×1/9)=-6;
(6)原式=(- 3/4)×4/5×(- 10/3)=2;
(7)原式=(- 16/5)×5/96=-1/6;
(8)原式=- 9/14×2/5=-9/35.
2.解:倒数依次为:-12/5,10/37,6,1/2,-5/9.-12/5<-5/9<10/37<1/2<6.
3.解:从上向下依次填写:- 2/3,7/12,4/9,3/20.
4.解:100×(5-(-1))/0.8=100×(6÷4/5)=750(m).
答:这个山峰的高度大约750m.