脱式计算.
|
(1)25×124+3600÷240,
=3100+15,
=3115;
(2)5.02-1.25-2.75,
=5.02-(1.25+2.75),
=5.02-4,
=1.02;
(3)(
-4 5
)÷1 4
+11 12
,1 6
=
÷11 20
+11 12
,1 6
=
+3 5
,1 6
=
;23 30
(4)1-(4.3×0.2-0.106),
=1-(0.86-0.106),
=1-0.754,
=0.246;
(5)[1-(
+2 5
)]÷1 3
,2 5
=[1-
]÷11 15
,2 5
=
÷4 15
,2 5
=
;2 3
(6)(
+1 6
-1 4
)×12,1 3
=
×12+1 6
×12-1 4
×12,1 3
=2+3-4,
=1.