如题所述
第1个回答 2019-03-14
99X38+38
=38X(99+1)
=38X100
=3800
=38X(99+1)
=38X100
=3800
第2个回答 2019-03-14
=(99+1)x38
=100x38
=3800
=100x38
=3800
第3个回答 2019-03-14
=(99+1)×38
=100×38
=3800本回答被提问者采纳
=100×38
=3800本回答被提问者采纳