题目内容
能简算的要简算.
2013×
(
+
)×36
×
+
×
÷0.2×
(
+
)×8+
.
2013×
| 2011 |
| 2012 |
(
| 3 |
| 4 |
| 5 |
| 8 |
| 5 |
| 9 |
| 3 |
| 4 |
| 5 |
| 9 |
| 1 |
| 4 |
| 3 |
| 20 |
| 2 |
| 3 |
(
| 3 |
| 8 |
| 1 |
| 27 |
| 19 |
| 27 |
考点:分数的简便计算
专题:运算定律及简算
分析:(1)根据乘法分配律进行简算;
(2)根据乘法分配律进行简算;
(3)根据乘法分配律进行简算;
(4)按照从左向右的顺序进行计算;
(5)根据乘法分配律和加法结合律进行简算.
(2)根据乘法分配律进行简算;
(3)根据乘法分配律进行简算;
(4)按照从左向右的顺序进行计算;
(5)根据乘法分配律和加法结合律进行简算.
解答:
解:(1)2013×
=(2012+1)×
=2012×
+1×
=2011+
=2011
;
(2)(
+
)×36
=
×36+
×36
=27+22
=49
;
(3)
×
+
×
=
×(
+
)
=
×1
=
;
(4)
÷0.2×
=
×
=
;
(5)(
+
)×8+
=
×8+
×8+
=3+
+
=3+(
+
)
=3+1
=4.
| 2011 |
| 2012 |
=(2012+1)×
| 2011 |
| 2012 |
=2012×
| 2011 |
| 2012 |
| 2011 |
| 2012 |
=2011+
| 2011 |
| 2012 |
=2011
| 2011 |
| 2012 |
(2)(
| 3 |
| 4 |
| 5 |
| 8 |
=
| 3 |
| 4 |
| 5 |
| 8 |
=27+22
| 1 |
| 2 |
=49
| 1 |
| 2 |
(3)
| 5 |
| 9 |
| 3 |
| 4 |
| 5 |
| 9 |
| 1 |
| 4 |
=
| 5 |
| 9 |
| 3 |
| 4 |
| 1 |
| 4 |
=
| 5 |
| 9 |
=
| 5 |
| 9 |
(4)
| 3 |
| 20 |
| 2 |
| 3 |
=
| 3 |
| 4 |
| 2 |
| 3 |
=
| 1 |
| 2 |
(5)(
| 3 |
| 8 |
| 1 |
| 27 |
| 19 |
| 27 |
=
| 3 |
| 8 |
| 1 |
| 27 |
| 19 |
| 27 |
=3+
| 8 |
| 27 |
| 19 |
| 27 |
=3+(
| 8 |
| 27 |
| 19 |
| 27 |
=3+1
=4.
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
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