问几道数学题.
问题描述:
问几道数学题.
(-6.5)*(-2)/(-3/1)/(-5)
6+(-1/5)-2-(-1.5)
(-2)二次方*5-(-2)三次方/4
答 下题的
答
(1) =13*(-3)/(-5)
=-39/(-5)
=39/5
2) =6-1/5-2+1.5
=5.3
3) =4*5-(-8)/4
=20-(-2)
=20+2
=22