2⼀3+2⼀9+2⼀27+2⼀81等于几?用简便方法

2025-04-18 11:14:06
推荐回答(2个)
回答1:

2/3+2/9+2/27+2/81
=54/81+18/81+6/81+2/81
=72/81+8/81
=80/81

回答2:

2/3+2/9+2/27+2/81
=2(27+9+3+1)/81
=80/81