题目内容
计算下面各题,能简算的就简算.
4.67-(2.98+0.67) | 1.25×0.4×0.25×8 | 2013×
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14.35÷3.5÷2 |
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(
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考点:小数四则混合运算,运算定律与简便运算
专题:运算顺序及法则
分析:(1)根据减法的性质进行简算;
(2)根据乘法交换律和结合律进行简算;
(3)根据乘法分配律进行简算;
(4)根据除法的性质进行简算;
(5)根据乘法分配律进行简算;
(6)根据乘法分配律进行简算.
(2)根据乘法交换律和结合律进行简算;
(3)根据乘法分配律进行简算;
(4)根据除法的性质进行简算;
(5)根据乘法分配律进行简算;
(6)根据乘法分配律进行简算.
解答:
解:(1)4.67-(2.98+0.67)
=4.67-2.98-0.67
=4.67-0.67-2.98
=4-2.98
=1.02;
(2)1.25×0.4×0.25×8
=(1.25×8)×(0.4×0.25)
=10×0.1
=1;
(3)2013×
=(2012+1)×
=2012×
+1×
=2011+
=2011
;
(4)14.35÷3.5÷2
=14.35÷(3.5×2)
=14.35÷7
=2.05;
(5)
×24+76×
=
×(24+76)
=
×100
=40;
(6)(
+
)×24
=
×24+
×24
=14+9
=23.
=4.67-2.98-0.67
=4.67-0.67-2.98
=4-2.98
=1.02;
(2)1.25×0.4×0.25×8
=(1.25×8)×(0.4×0.25)
=10×0.1
=1;
(3)2013×
2 011 |
2 012 |
=(2012+1)×
2 011 |
2 012 |
=2012×
2 011 |
2 012 |
2 011 |
2 012 |
=2011+
2 011 |
2 012 |
=2011
2 011 |
2 012 |
(4)14.35÷3.5÷2
=14.35÷(3.5×2)
=14.35÷7
=2.05;
(5)
2 |
5 |
2 |
5 |
=
2 |
5 |
=
2 |
5 |
=40;
(6)(
7 |
12 |
3 |
8 |
=
7 |
12 |
3 |
8 |
=14+9
=23.
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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