7/9ⅹ14/15+7/15ⅹ1/9简便运算
第1个回答 2019-09-05
原式=7/15x(14/9+1/9)
=7/15x15/9
=7/9
=7/15x15/9
=7/9
第2个回答 2020-09-12
3/4×7/9+2/9×3/4 =3/4×(7/9+2/9) =3/4×1 =3/4 11/12×4/7×12/13 =11/12×12/13×4/7 =11/13×4/7 =44/91
第3个回答 2019-09-05
7/9×14/15+7/15×1/9
=7/9×14/15+1/15×7/9
=7/9×(14/15+1/15)
=7/9×1
=7/9本回答被网友采纳
=7/9×14/15+1/15×7/9
=7/9×(14/15+1/15)
=7/9×1
=7/9本回答被网友采纳