(1000+123+234)×(123+234+345)-(1000+123+234+345)×(123+234)简便运算
问题描述:
(1000+123+234)×(123+234+345)-(1000+123+234+345)×(123+234)
简便运算
答
(1000+123+234)×(123+234+345)-(1000+123+234+345)×(123+234)
简便运算