Question

简便运算 六分之五乘八分之七减十二分之五乘六分之五

Answer 1

解六分之五乘八分之七减十二分之五乘六分之五
=5/6*7/8-5/12*5/6
=5/6*(7/8-5/12)
=5/6*(21/24-10/24)
=5/6*11/24
=55/144