作业帮6(-125)/17+(+315)*17-(-166)/17-(-1/17)怎么算
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6(-125)/17+(+315)*17-(-166)/17-(-1/17)怎么算
6(-125)/17+(+315)*17-(-166)/17-(-1/17)怎么算
6(-125)/17+(+315)*17-(-166)/17-(-1/17)怎么算
6(-125)/17+(+315)/17-(-166)/17-(-1/17)
=-750/17+315/17+166/17+1/17
=(-750+315+166+1)/17
=-268/17
=-15又17分之13
2.25×(-2.3）×3/25
=0.09×25×(-2.3）×3/25
=-0.09×2.3×3
=-（0.1-0.01）×6.9
=-0.1×6.9+0.01×6.9
=-0.69+0.069
=-0.621