(1)5000-27÷18×106,
=5000-1.5×106,
=5000-159,
=4841;
(2)48×10.1+3.6-2.8+7.4-7.2,
=48×(10+0.1)+3.6-2.8+(7.4-7.2),
=480+4.8-2.8+(3.6+0.2),
=480+2+3.8,
=485.8;
(3)
×(9 7
-7 9
),7 27
=
×9 7
-7 9
×7 27
,9 7
=1-
,1 3
=
;2 3
(4)
÷[2-(11 18
+1 4
)],5 6
=
÷[2-11 18
],13 12
=
÷11 18
,11 12
=
×11 18
,12 11
=
;2 3
(5)(54+
)÷9,9 13
=(54+
)×9 13
,1 9
=54×
+1 9
×9 13
,1 9
=6+
,1 13
=6
.1 13