题目内容
能用简便方法的要用简便方法
8
-2
+1
4.38÷
+3.62×
(
-
-
)÷
.
8
| 6 |
| 11 |
| 5 |
| 13 |
| 5 |
| 11 |
4.38÷
| 4 |
| 3 |
| 3 |
| 4 |
(
| 2 |
| 3 |
| 1 |
| 4 |
| 5 |
| 12 |
| 1 |
| 24 |
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)根据加法交换律简算即可;
(2)(3)把除法转化为乘法后根据乘法分配律简算即可.
(2)(3)把除法转化为乘法后根据乘法分配律简算即可.
解答:
解:(1)8
-2
+1
=8
+1
-2
=10-2
=7
(2)4.38÷
+3.62×
=4.38×
+3.62×
=(4.38+3.62)×
=8×
=6
(3)(
-
-
)÷
=(
-
-
)×24
=
×24-
×24-
×24
=16-6-10
=0
| 6 |
| 11 |
| 5 |
| 13 |
| 5 |
| 11 |
=8
| 6 |
| 11 |
| 5 |
| 11 |
| 5 |
| 13 |
=10-2
| 5 |
| 13 |
=7
| 8 |
| 13 |
(2)4.38÷
| 4 |
| 3 |
| 3 |
| 4 |
=4.38×
| 3 |
| 4 |
| 3 |
| 4 |
=(4.38+3.62)×
| 3 |
| 4 |
=8×
| 3 |
| 4 |
=6
(3)(
| 2 |
| 3 |
| 1 |
| 4 |
| 5 |
| 12 |
| 1 |
| 24 |
=(
| 2 |
| 3 |
| 1 |
| 4 |
| 5 |
| 12 |
=
| 2 |
| 3 |
| 1 |
| 4 |
| 5 |
| 12 |
=16-6-10
=0
点评:此题主要考查了分数、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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