计算下列各题,能用简算的请用简便方法:(1)2014×101.1-201.3×1011(2)(13-14)÷12+56(3)23×3

计算下列各题,能用简算的请用简便方法:(1)2014×101.1-201.3×1011(2)(13-14)÷12+56(3)23×3÷23×3(4)89×[34-(716-0.25)].

第1个回答  2014-12-15
(1)2014×101.1-201.3×1011
=(2014-2013)×101.1
=1×101.1
=101.1;

(2)(
1
3
-
1
4
)÷
1
2
+
5
6

=
1
12
÷
1
2
+
5
6

=
1
6
+
5
6

=1;

(3)
2
3
×3÷
2
3
×3
=2÷
2
3
×3
=3×3
=9;

(4)
8
9
×[
3
4
-(
7
16
-0.25)]
=
8
9
×[
3
4
-
3
16
]
=
8
9
×
9
16

=
1
2
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