简便运算：1）（7/8+13/16）÷13/16 2）76×3/77
问题描述：
简便运算：1）（7/8+13/16）÷13/16 2）76×3/77
答
（7/8+13/16）÷13/16
=7/8x16/13+13/16x16/13
=14/13+1
=27/13
76×3/77
=(77-1)x3/77
=77x3/77-1x3/77
=3-3/77
=228/77
答
（7/8+13/16）÷13/16
=7/8÷13/16+13/16÷13/16
=14/13+1
=27/13
76×3/77
=(77-1)×3/77
=77×3/77-1×3/77
=3-3/77
=2又74/77