7.8×6.9+2.6×79.3
=2.6x3x6.9+2.6x79.3
=2.6x(20.7+79.3)
=2.6x100
=260
24.6×4.6+2.46×44+246×0.1
=24.6x4.6+24.6x4.4+24.6x1
=24.6x(4.6+4.4+1)
=24.6x10
=246
用简便方法计算：1、7.8×6.9+2.6×79.3 2、24.6×4.6+2.46×44+246×0.1
用简便方法计算：1、7.8×6.9+2.6×79.3 2、24.6×4.6+2.46×44+246×0.1
数学人气：228 ℃时间：2020-03-25 18:07:32
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