Question

13分之22一11分之6÷22分之21一7分之3用简便计算

Answer 1

22/13-6/11÷21/22-3/7
=22/13-6/11×22/21-3/7
=22/13-6/21×22/11-3/7
=22/13-2/7×2/1-3/7
=22/13-4/7-3/7
=1又10/13-1
=10/13