7.8乘以6.9 +2.6乘以79.3用简便方法怎 - 知识问答

7.8乘以6.9 +2.6乘以79.3用简便方法怎么计算

1个回答

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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