题目内容
计算.(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 |
| 24 |
| 1 |
| 24 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)运用加法交换律解答,
(2)(3)运用乘法分配律解答.
(2)(3)运用乘法分配律解答.
解答:
解:(1)8
-2
+1
=8
+1
-2
=10-2
=7
;
(2)4.38÷
+3.62×
=(4.38+3.62)×
=8×
=6;
(3)(
-
-
)÷
=
÷
-
÷
-
÷
=16-6-5
=5.
| 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+3.62)×
| 3 |
| 4 |
=8×
| 3 |
| 4 |
=6;
(3)(
| 2 |
| 3 |
| 1 |
| 4 |
| 5 |
| 24 |
| 1 |
| 24 |
=
| 2 |
| 3 |
| 1 |
| 24 |
| 1 |
| 4 |
| 1 |
| 24 |
| 5 |
| 24 |
| 1 |
| 24 |
=16-6-5
=5.
点评:正确运用简便方法解决问题,是本题考查知识点.
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