(2+23+234)×(23+234+2345)-(2+23+234+2345)×(23+234)等于多少,

问题描述:

(2+23+234)×(23+234+2345)-(2+23+234+2345)×(23+234)等于多少,

(2+23+234)×(23+234+2345)-(2+23+234+2345)×(23+234)=2×(23+234+2345)+(23+234)×(23+234+2345)-2×(23+234)-(23+234+2345)×(23+234)=2×(23+234+2345)-2×(23+2...