(1234567+2345671+3456712+4567123+5671234+6712345+7123456)/ 2
(1234567+2345671+3456712+4567123+5671234+6712345+7123456)/ 2
①(1234567+2345671+3456712+4567123+5671234+6712345+7123456)/7
计算:(1234567+2345671+3456712+4567123+5671234+6712345+7123456)
(1234567+2345671+3456712+4567123+5671234+6712345+7123456)除以7
(1234567+2345671+3456712+4567123+5671234+6712345+7123456)÷7你
(1234567+2345671+3456712+4567123+5671234+6712345
(2010+2008+2006+.+2)-(1+3+5+.+2009)
111+222+333+444+555+666+777+888++++++++++++++++++++++999=?
1.(2+4+6+.1984+1986+1988)-(1+3+5+.+1985+1987)=?
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20 =
(+1)+(-2)+(+3)+(-4)++(+99)+(-100)等于几?
2+4+6+8+10+……+48+50