第1个回答 2009-08-02
2.4*0.19+0.24*8.1
=0.24*1.9+0.24*8.1
=0.24*(1.9+8.1)
=0.24*10
=2.4
第2个回答 2019-01-05
题目发错了,应该是0.24吧
2.4*0.19+0.24*8.1
=2.4×0.19+2.4×0.81
=2.4×(0.19+0.81)
=2.4×1
=2.4
满意请采纳,不懂请追问
第3个回答 2009-08-02
原式=2.4*0.19+2.4*0.1*0.81*10=2.4*0.19+2.4*0.81=2.4*(0.19+0.81)=2.4*1=2.4
第4个回答 2009-08-02
原式=0.24*1.9+0.24*8.1
=0.24*(1.9+8.1)
=2.4