
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...
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)].
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(1)2014×101.1-201.3×1011
=(2014-2013)×101.1
=1×101.1
=101.1;
(2)(
-
)÷
+
=
÷
+
=
+
=1;
(3)
×3÷
×3
=2÷
×3
=3×3
=9;
(4)
×[
-(
-0.25)]
=
×[
-
]
=
×
=
.
=(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 |
2 |
3 |
=2÷
2 |
3 |
=3×3
=9;
(4)
8 |
9 |
3 |
4 |
7 |
16 |
=
8 |
9 |
3 |
4 |
3 |
16 |
=
8 |
9 |
9 |
16 |
=
1 |
2 |
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