题目内容
| 计算 160.6×2
| 2100÷[56×(
| 2002×
| ||||||||||||||||||||||||
9
| 2-
|
|
考点:整数、分数、小数、百分数四则混合运算,运算定律与简便运算
专题:运算顺序及法则,运算定律及简算
分析:(1)(3)(6)根据乘法分配律简算即可;
(2)首先计算小括号里面的,然后计算中括号里面,最后计算中括号外面的即可;
(4)根据减法的性质简算即可;
(5)首先计算除法,然后根据减法的性质计算即可.
(2)首先计算小括号里面的,然后计算中括号里面,最后计算中括号外面的即可;
(4)根据减法的性质简算即可;
(5)首先计算除法,然后根据减法的性质计算即可.
解答:
解:(1)160.6×2
-0.6÷
=160.6×
-0.6×
=(160.6-0.6)×
=160×
=440
(2)2100÷[56×(
-
)]
=2100÷[56×
]
=2100÷3
=700
(3)2002×
=(2000+2)×
=2000×
+2×
=999+0.999
=999.999
(4)9
-(2
-
×
)
=9
-2
+
=7+
=7
(5)2-
÷
-
=2-
-
=2-(
+
)
=2-2
=0
(6)
×56
+44
×
-
=
×(56
+44
-1)
=
×100
=75
| 3 |
| 4 |
| 4 |
| 11 |
=160.6×
| 11 |
| 4 |
| 11 |
| 4 |
=(160.6-0.6)×
| 11 |
| 4 |
=160×
| 11 |
| 4 |
=440
(2)2100÷[56×(
| 3 |
| 7 |
| 3 |
| 8 |
=2100÷[56×
| 3 |
| 56 |
=2100÷3
=700
(3)2002×
| 999 |
| 2000 |
=(2000+2)×
| 999 |
| 2000 |
=2000×
| 999 |
| 2000 |
| 999 |
| 2000 |
=999+0.999
=999.999
(4)9
| 8 |
| 13 |
| 8 |
| 13 |
| 1 |
| 7 |
| 6 |
| 13 |
=9
| 8 |
| 13 |
| 8 |
| 13 |
| 6 |
| 91 |
=7+
| 6 |
| 91 |
=7
| 6 |
| 91 |
(5)2-
| 6 |
| 13 |
| 9 |
| 26 |
| 2 |
| 3 |
=2-
| 4 |
| 3 |
| 2 |
| 3 |
=2-(
| 4 |
| 3 |
| 2 |
| 3 |
=2-2
=0
(6)
| 3 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
| 3 |
| 4 |
| 3 |
| 4 |
=
| 3 |
| 4 |
| 7 |
| 8 |
| 1 |
| 8 |
=
| 3 |
| 4 |
=75
点评:此题主要考查了整数、分数、小数四则混合运算,注意运算顺序,注意乘法运算定律的应用.
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