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8*6.9+2.6*79.3简便算
人气：461 ℃　时间：2020-04-13 14:52:55
解答
7.8×6.9+2.6×79.3
=（2.6×3）×6.9+2.6×79.3
=2.6×20.7+2.6×79.3
=2.6×（20.7+79.3）
=2.6×100
=260
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