有理数乘除19/(-7)-128/(-7)+33/(-7)

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有理数乘除19/(-7)-128/(-7)+33/(-7)有理数乘除19/(-7)-128/(-7)+33/(-7)有理数乘除19/(-7)-128/(-7)+33/(-7)19/(-7)-128/(

有理数乘除19/(-7)-128/(-7)+33/(-7)
有理数乘除
19/(-7)-128/(-7)+33/(-7)

有理数乘除19/(-7)-128/(-7)+33/(-7)
19/(-7)-128/(-7)+33/(-7)
=-19/7+128/7-33/7
=(128-33-19)/7
=76/7

19/(-7)-128/(-7)+33/(-7)=(-19+128-33)/7=76/7

原式=128/7-19/7-33/7
=76/7

好简单啊!楼上的都对啊!七分之七十六!同分母运算!