(1)208×35÷(100-48)
=208×35÷52,
=208÷52×35,
=4×35,
=140;
(2)
÷7+8 13
×1 7
5 13
=
×8 13
+1 7
×1 7
,5 13
=(
+8 13
)×5 13
,1 7
=1×
,1 7
=
;1 7
(3)2-
÷6 13
-9 26
2 3
=2-
-4 3
,2 3
=2-(
+4 3
),2 3
=2-2,
=0;
(4)[
-(14 15
+2 5
)]÷1 3
7 10
=[
-14 15
]×11 15
,10 7
=
×1 5
,10 7
=
.2 7