(-72)减(-37)减(-22)减17,这道题能不能简算

问题描述:

(-72)减(-37)减(-22)减17,这道题能不能简算

(-72)减(-37)减(-22)减17
=-72+37+22-17
=22-72+37-17
=-50+20
=-30
祝学习进步,望采纳。。。

原式=-72+37+22-17
=(37-17)+(22-72)
=20-50=-30 OK?

(-72)减(-37)减(-22)减17
=(-72)+37+22减17
=(37+22)-(72+17)
=59-89
=-30

(-72)减(-37)减(-22)减17
=-72+37+22-17
=22-72+37-17
=-50+20
=-30

=-72+37+22-17
=-(72-22)+(37-17)
=-50+20
=-30

(-72)减(-37)减(-22)减17
=-72+37+22-17
=(-72+22)+(37-17)
=-50+20
=-30