如题所述
温馨提示:答案为网友推荐,仅供参考
第1个回答 2019-05-20
69x102一138
=69ⅹ102一69x2
=69x(102一2)
=6900
=69ⅹ102一69x2
=69x(102一2)
=6900
第2个回答 2019-05-20
69×102-138
=69×(102-2)
=69×100
=6900
=69×(102-2)
=69×100
=6900
第3个回答 2022-06-06
=69×102-69×2
=69x(102-2)
=69x100
6900
=69x(102-2)
=69x100
6900