2-(6/13)/(9/26)-2/3
=2-(6/13)*(26/9)-2/3
=2-4/3-2/3
=0
(0.75-3/16)*(2/9+1/3)
=(3/4-3/16)*(2/9+1/3)【0.75转化成3/4】【3/4读做四分之三,以此类推】
=(12/16-3/16)*(2/9+3/9)
=9/16*5/9
=5/16
2-(6/13)/(9/26)-2/3
=2-(6/13)*(26/9)-2/3
=2-4/3-2/3
=0
(0.75-3/16)*(2/9+1/3)
=(3/4-3/16)*(2/9+1/3)【0.75转化成3/4】【3/4读做四分之三,以此类推】
=(12/16-3/16)*(2/9+3/9)
=9/16*5/9
=5/16