9999*0.7+1111*2.7
问题描述：
9999*0.7+1111*2.7
答
9999*0.7+1111*2.7=6999.3+2999.7=9999
答
原式=1111×（9×0.7）+1111×2.7
=1111×（6.3+2.7）
=1111×9
=9999