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7+57+85+68+58=多少?

应该是等于275

59*7/58+57*5/58 =(58+1)*7/58+(58-1)*5/58 =58*7/58+1*7/58+58*5/58-1*5/58 =7+7/58+5-5/58 =12+2/58 =12+1/29

59*7/58+57*5/58 =(58+1)*7/58+(58-1)*5/58 =7+7/58+5-5/58 =12+1/29 =12又1/29

+9+21+5+4+8+789+125+8+54+54+58+57+57+85+875+785+75+7+547+57+85+78+54+4+587+6578+658+964=12678 不得不告诉楼主 你多大了好几个加号!!

1+2-3+4+5-6+7+8-9+。。。。。+58+59-60 =0+3+6+。。。。。+57 =(0+57)x20/2 =570.

7+58-40,先算58-40=18 18+7=25

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