(-72)-(-37)-(-22)-17这道题怎么做

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(-72)-(-37)-(-22)-17这道题怎么做

(-72)-(-37)-(-22)-17这道题怎么做
(-72)-(-37)-(-22)-17这道题怎么做

(-72)-(-37)-(-22)-17这道题怎么做
(-72)-(-37)-(-22)-17
=-72+37+22-17
=-72+22+37-17
=-50+20
=-30

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