求规律:1+2+3+4+5+6+7=规律 101+102+103+104+105+= 77+78+79+80+81+82= 22+23+24+25+26+27+28+29=求规律:1+2+3+4+5+6+7=( ) ×( )101+102+103+104+105= =( ) ×( )77+78+79+80+81+82=( + ) ×322+23+24+25+26+27+28+29=( + ) ×4
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 02:24:38
![求规律:1+2+3+4+5+6+7=规律 101+102+103+104+105+= 77+78+79+80+81+82= 22+23+24+25+26+27+28+29=求规律:1+2+3+4+5+6+7=( ) ×( )101+102+103+104+105= =( ) ×( )77+78+79+80+81+82=( + ) ×322+23+24+25+26+27+28+29=( + ) ×4](/uploads/image/z/24553-1-3.jpg?t=%E6%B1%82%E8%A7%84%E5%BE%8B%EF%BC%9A1%2B2%2B3%2B4%2B5%2B6%2B7%3D%E8%A7%84%E5%BE%8B+101%2B102%2B103%2B104%2B105%2B%3D+77%2B78%2B79%2B80%2B81%2B82%3D+22%2B23%2B24%2B25%2B26%2B27%2B28%2B29%3D%E6%B1%82%E8%A7%84%E5%BE%8B%EF%BC%9A1%2B2%2B3%2B4%2B5%2B6%2B7%3D%EF%BC%88+%EF%BC%89+%C3%97%EF%BC%88+%EF%BC%89101%2B102%2B103%2B104%2B105%3D+%3D%EF%BC%88+%EF%BC%89+%C3%97%EF%BC%88+%EF%BC%8977%2B78%2B79%2B80%2B81%2B82%3D%EF%BC%88+%2B+%EF%BC%89+%C3%97322%2B23%2B24%2B25%2B26%2B27%2B28%2B29%3D%EF%BC%88+%2B+%EF%BC%89+%C3%974)
求规律:1+2+3+4+5+6+7=规律 101+102+103+104+105+= 77+78+79+80+81+82= 22+23+24+25+26+27+28+29=求规律:1+2+3+4+5+6+7=( ) ×( )101+102+103+104+105= =( ) ×( )77+78+79+80+81+82=( + ) ×322+23+24+25+26+27+28+29=( + ) ×4
求规律:1+2+3+4+5+6+7=规律 101+102+103+104+105+= 77+78+79+80+81+82= 22+23+24+25+26+27+28+29=
求规律:1+2+3+4+5+6+7=( ) ×( )
101+102+103+104+105= =( ) ×( )
77+78+79+80+81+82=( + ) ×3
22+23+24+25+26+27+28+29=( + ) ×4
求规律:1+2+3+4+5+6+7=规律 101+102+103+104+105+= 77+78+79+80+81+82= 22+23+24+25+26+27+28+29=求规律:1+2+3+4+5+6+7=( ) ×( )101+102+103+104+105= =( ) ×( )77+78+79+80+81+82=( + ) ×322+23+24+25+26+27+28+29=( + ) ×4
1+2+3+4+5+6+7=( 4 ) ×( 7)
规律是首相加末相乘项数除以二
101+102+103+104+105= (103 ) ×( 5 )
77+78+79+80+81+82=(77 + 82 ) ×3
22+23+24+25+26+27+28+29=( 22 + 29) ×4
等差数列和计算:1/2*(第一个数字+最后一个数字)*数字的数量 运用范围:相邻两数之差相等 例:1+2+3+4+5+6+7+8+9+10=1/2*(1+10)*10=55