(300+301+302...+397)-(100+101+...197)=

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/29 12:45:56
(300+301+302...+397)-(100+101+...197)=
x)060660b#===mcKsM] C!P(bI*'V~ I>YZuPc=`!Hgxz .Ks @ h~qAbK.

(300+301+302...+397)-(100+101+...197)=
(300+301+302...+397)-(100+101+...197)=

(300+301+302...+397)-(100+101+...197)=
去掉括号
300+301+302...+397-100-101-...197
=(300-100)+(301-101)+(302-102)+.(397-197)
=200*97