7.6乘0.28加0.24乘2.8简便计算

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7.6乘0.28加0.24乘2.8简便计算

7.6乘0.28加0.24乘2.8简便计算
7.6乘0.28加0.24乘2.8简便计算

7.6乘0.28加0.24乘2.8简便计算
7.6×0.28+0.24×2.8
=(7.6÷10)×(0.28×10)+0.24×2.8
=0.76×2.8+0.24×2.8
=(0.76+0.24)×2.8
=1×0.28
=0.28

0.28*(7.6+2.4)