(1)
÷1 7
×5,2 3
=
×5,3 14
=
;15 14
(2)
÷9+6 25
×6 25
,8 9
=
×6 25
+1 9
×6 25
,8 9
=
×(6 25
+1 9
),8 9
=
×1,6 25
=
;6 25
(3)5×(
-1 3
)÷1 5
,5 12
=5×
÷2 15
,5 12
=
×2 3
,12 5
=
;8 5
(4)48×(
+1 3
-1 4
),1 2
=48×
+48×1 3
-48×1 4
,1 2
=16+12-24,
=28-24,
=4.