题目内容
下面各题,怎样算简便就怎样算:
(6-
-
)×
12×(
+
)+
÷
+
×
3.5×
+350%×1.625+0.35×80.
(6-
| 2 |
| 13 |
| 11 |
| 13 |
| 3 |
| 5 |
12×(
| 5 |
| 6 |
| 3 |
| 4 |
| 4 |
| 5 |
| 7 |
| 9 |
| 11 |
| 5 |
| 2 |
| 9 |
| 5 |
| 11 |
3.5×
| 3 |
| 8 |
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)根据减法的性质简算即可;
(2)(3)(4)根据乘法分配律简算即可.
(2)(3)(4)根据乘法分配律简算即可.
解答:
解:(1)(6-
-
)×
=[6-(
+
)]×
=[6-1]×
=3
(2)12×(
+
)+
=12×
+12×
+
=10+9+0.8
=19.8
(3)
÷
+
×
=(
+
)×
=1×
=
(4)3.5×
+350%×1.625+0.35×80
=3.5×(0.375+1.625+8)
=3.5×10
=35
| 2 |
| 13 |
| 11 |
| 13 |
| 3 |
| 5 |
=[6-(
| 2 |
| 13 |
| 11 |
| 13 |
| 3 |
| 5 |
=[6-1]×
| 3 |
| 5 |
=3
(2)12×(
| 5 |
| 6 |
| 3 |
| 4 |
| 4 |
| 5 |
=12×
| 5 |
| 6 |
| 3 |
| 4 |
| 4 |
| 5 |
=10+9+0.8
=19.8
(3)
| 7 |
| 9 |
| 11 |
| 5 |
| 2 |
| 9 |
| 5 |
| 11 |
=(
| 7 |
| 9 |
| 2 |
| 9 |
| 5 |
| 11 |
=1×
| 5 |
| 11 |
=
| 5 |
| 11 |
(4)3.5×
| 3 |
| 8 |
=3.5×(0.375+1.625+8)
=3.5×10
=35
点评:此题主要考查了整数、分数、百分数的四则混合运算,注意运算顺序,注意加法、乘法运算定律的应用.
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