1.[-7/12+3/4-(-5/6)]*(-36)
=(-7/12)*(-36)+(3/4)*(-36)+(-5/6)*(-36)
=21-27+30
2. [2.5+(8/3+1/6-3/4)*24]/(-5)*(-1)^2009
=[2.5+64+4-18]/5
=10.5
3.(1-1/2)*(1+1/2)*(1-1/3)*(1+1/3)*(1-1/4)*(1-1/4)*......*(1-1/99)*(1+1/99)
=额 这个呢 是不是打错了、、 可以追问 我在给你打
4. -1+[1-(1-0.6*1/3)]*[3-(-3)*(-4)]
=-1+[1-(0.8)]*(3-12)
=-1+(0.2)*(-9)
=-1-1.8
=-2.8
5. (5/7)/(-12/5)-5/7*(5/12)-(5/3)/4
=-(25/84)-(25/84)-(5/12)
=-(25+25+35)/84
=-85/84(数真的好奇怪。。)
6. |-5-4|-(+5)*(-2)^2-1/(-3)
=9-20+1/3
=-11+1/3
7.A=-B C=1/D Y+1=0
则 Y^3+(A+B)^2010+CD=0+0+1=1
你是要直接写答案还是要步骤
jjj