=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. ...
在横线里填上“<”“>”或“=”.105×6___90 53-19___63-19 300×8___800×3790克___1千克 52千克___5200克 8×29+29___29×9.
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...
Bobby was famous for his attempt (尝试) to climb the big snowy mountain.He had tried at least thirty times,but had (41)___ failed.One day,he finally reached the mountain top successfully with old Peeper's help.Peeper was the town optician (眼镜商),who gave a hand to his success.It...
在横线上里填上“>”、“<”或“=”30×3___20×3 1kg___900g 460÷2___690÷3600÷9___360÷6 800+2___800×2 90+0___90-03000米___5千米 2时___200分 600毫米_