简便计算:
5/9-(2/9+1/6)
=5/9-2/9-1/6
=1/3-1/6
=1/6
4/7-(2/7+1/8)
=4/7-2/7-1/8
=2/7-1/8
=9/56
(“/”为分数线,望采纳,谢谢)
九分之五-(九分之二+六分之一)
=5/9-2/9-1/6
=3/9-1/6
=1/3-1/6
=2/6-1/6
=1/6
七分之四-(七分之二+八分之一)
=4/7-2/7-1/8
=2/7-1/8
=16/56-7/56
=9/56
5/9-(2/9+1/6)
=5/9-2/9-1/6
=3/9-1/6
=2/6-1/6
=1/6
4/7-(2/7+1/8)
=4/7-2/7-1/8
=2/7-1/8
=16/56-7/56
=9/56