16+18+20+22+24= ___ × ___
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/09/21 15:35:33
16+18+20+22+24= ___ × ___
130+140+150+160+170= ___ × ___ .
130+140+150+160+170= ___ × ___ .
(1)16+18+20+22+24,
=(20-4)+(20-2)+20+(20+2)+(20+4),
=20+20+20+20+20+(4+2-2-4),
=20+20+20+20+20,
=20×5;
(2)130+140+150+160+170,
=(150-20)+(150-10)+150+(150+10)+(150+20),
=(150+150+150+150+150)+(20+10-20-10),
=150+150+150+150+150,
=150×5;
故答案为:20,5;150,5.
=(20-4)+(20-2)+20+(20+2)+(20+4),
=20+20+20+20+20+(4+2-2-4),
=20+20+20+20+20,
=20×5;
(2)130+140+150+160+170,
=(150-20)+(150-10)+150+(150+10)+(150+20),
=(150+150+150+150+150)+(20+10-20-10),
=150+150+150+150+150,
=150×5;
故答案为:20,5;150,5.
16+18+20+22+24= ___ × ___
%>___
be good at =___ ___ ___
return from=___ ___ ___?
___ ___ ___ 10 ___ 20 找规律填数,
按中文写出英语句子昨天的雨很大.___ ___ ___ ___ ___last night.=___ ___ ___ l
①57.32°=___度___分___秒②27°14'24''=___度③62.125°=___度___分___秒 ④4
英语翻译The ___ ___ is ___ ___ ___ ___ ___.
已知a+b=14,b+c=20,a+c=16,则a=___,b=___,c=___
81.21°=___度___分___秒
Will you help me=Will you___ ___ ___ ___?
the room is tidy =it is ___ ___ ___