26×15.6+15.7×24简便计算
=26x15.6+15.6x24+0.1x24
=（26+24）x15.6+2.4
=50x15.6+2.4
=780+24
=782.4
＝26×15.6+15.6×24+0.1×24
＝（26+24）×15.6+2.4
＝50×15.6+2.4
＝78+2.4
＝80.4
26×15.6+15.7×24
=26×15.6+（15.6+0.1）×24
=26×15.6+15.6×24+0.1×24
=（26+24）×15.6+2.4
=50×15.6+2.4
=780+2.4
=782.4
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