12.78-(1.78-1.24)+6.76能简算吗?
人气：416 ℃ 时间：2020-04-12 08:54:27
解答
12.78-(1.78-1.24)+6.76
=12.78-1.78+1.24+6.76
=(12.78-1.78)+(1.24+6.76)
=11 + 8
=19
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