题目内容

脱式计算.
25×124+3600÷240   5.02-1.25-2.75[1-(
2
5
+
1
3
)]÷
2
5
(
1
6
+
1
4
-
1
3
)×12
1-(4.3×0.2-0.106)
(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)[1-(
2
5
+
1
3
)]÷
2
5

=[1-
11
15
]÷
2
5

=
4
15
÷
2
5

=
2
3


(4)(
1
6
+
1
4
-
1
3
)×12,
=
1
6
×
12+
1
4
×
12-
1
3
×
12,
=2+3-4,
=5-4,
=1;

(5)1-(4.3×0.2-0.106),
=1-(0.86-0.106),
=1-0.754,
=0.246.
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