(1+2+3+4+5+6+7+8+7+6+5+4+3+2+1)⼀(88888888*88888888)=?的简便方法?

2024-12-12 05:50:03
推荐回答(2个)
回答1:

(1+2+3+4+5+6+7+8+7+6+5+4+3+2+1)/(88888888*88888888)
=8*8/(88888888*88888888)
=1/(1111111*1111111)=1/123456787654321

回答2:

=[(1+7)+(2+6)+(3+5)+8+(7+1)+(6+2)+(5+3)+(4+4)]/(88888888*88888888)
=8*8/(88888888*88888888)
=1/(11111111*11111111)
=1/123456787654321