7.69*0.8+2*0.769简便计算简便计算,急,

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7.69*0.8+2*0.769简便计算简便计算,急,

7.69*0.8+2*0.769简便计算简便计算,急,
7.69*0.8+2*0.769简便计算
简便计算,急,

7.69*0.8+2*0.769简便计算简便计算,急,
7.69*0.8+2*0.769
=7.69*0.8+0.2*7.69
=7.69x(0.8+0.2)
=7.69x1
=7.69

7.69*0.8+2*0.769
=7.69*0.8+0.2*7.69
=7.69*(0.8+0.2)
=7.69

7.69*0.8+2*0.769

=7.69*0.8+0.2*7.69
=7.69*(0.8+0.2)
=7.69*1
=7.69