0.25+(-1/8)-(+7/8)-(+3/4)
=1/4-1/8-7/8-3/4
=2/8-1/8-7/8-6/8
=-3/2
=-1又1/2
-3-〔-5+(1-3*3/5)/(-2)〕
=-3-[-5+(-4/5)/(-2)〕
=-3-[-5+2/5]
=-3-[-23/5]
=-15/5+23/5
=8/5
=1又3/5
9又14/15*(-15)
=-149/15*15
=-149
-6²*(-1又1/2)²-3²/(1又1/2)三次方*3
=-36*9/4-9/(27/8)*3
=-81-8
=-89
0.25+(-1/8)-(+7/8)-(+3/4)
=1/4-1/8-7/8-3/4
=(1/4-3/4)-(1/8+7/8)
=-1/2-1
=-3/2
还有-3-〔-5+(1-3*3/5)/(-2)〕
=-3-(-5+2/5)
=-3+5-2/5
=8/5
9又14/15*(-15)
=(10-1/15)×(-15)
=-150+1
=-149
-6²*(-1又1/2)²-3²/(1又1/2)三次方*3
=-(6×3/2)²-9/(3/2)³*3
=-81-8/3×3
=-89