3/8乘2/9+7/9除8/3等于多少

问题描述:

3/8乘2/9+7/9除8/3等于多少

3/8乘2/9+7/9除8/3
=3/8×2/9+7/9×3/8
=3/8×(2/9+7/9)
=3/8×1
=3/8