=7×(90-1)=7×90-7×1=7×90-7所以答案是7.9×51=9×(50+1)=9×50+9×1=9×50+9所以答案是9.故答案为:7,9. ①把7×89运用乘法的分配律进行解答即7×89=7×(90-1)=7×90-7×1,由此可知答案.②把9×51运用乘法的分配律进行解答,9×51=9×(50+1)=9×50+9×1,由此可知答案. ...
9:00-9:45a.m. Blue Tent Panelists(成员): Jami Bernard, David Kamp, Marion Nestle and Peter Singer. Hosted by Denise Gray, science writer for The New York Times. How does what we eat not only affect our bodies, but also the world? The food and nutrition experts debate the role that...