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数学7上：若a=25，b=-9，确定a1999+b2000结果的末尾数字是多少？
VID20190905104513~2
七年级数学，代数式，单项式，多项式，整式加减，化简培优专题74/164
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App02:30![数学7上：(2a²b+2ab²)-[2(a²b-1)+3ab²+2]，整式加减化简求值](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/321efccad2da40a093e3da72df4f5732~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20250105001420407BF926DF76EBB3A3FE&requestFrom=704&version_code=80402&x-expires=1767543260&x-signature=ZyRFJC0tX0K4GAdyTPcyyGZ4rkk%3D)
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