题目内容
(2012?陕西模拟)能简算得要简算.
410-
|
8×
|
5+0.45÷0.9-1.75 | 1110÷[56×(
|
分析:(1)依据减法性质解答,
(2)运用乘法分配律解答,
(3)先算第二级运算,再按照从左到右顺序解答,
(4)运用乘法分配律解答.
(2)运用乘法分配律解答,
(3)先算第二级运算,再按照从左到右顺序解答,
(4)运用乘法分配律解答.
解答:解:(1)410-
-
-
,
=410-(
+
+
),
=410-1,
=409;
(2)8×
+8×
+8,
=8×(
+
+1),
=8×2,
=16;
(3)5+0.45÷0.9-1.75,
=5+0.5-1.75,
=5.5-1.75,
=3.75;
(4)1110÷[56×(
-
)],
=1110÷[56×
-56×
],
=1110÷[24-21],
=1110÷3,
=370.
| 1 |
| 7 |
| 2 |
| 7 |
| 4 |
| 7 |
=410-(
| 1 |
| 7 |
| 2 |
| 7 |
| 4 |
| 7 |
=410-1,
=409;
(2)8×
| 3 |
| 5 |
| 2 |
| 5 |
=8×(
| 3 |
| 5 |
| 2 |
| 5 |
=8×2,
=16;
(3)5+0.45÷0.9-1.75,
=5+0.5-1.75,
=5.5-1.75,
=3.75;
(4)1110÷[56×(
| 3 |
| 7 |
| 3 |
| 8 |
=1110÷[56×
| 3 |
| 7 |
| 3 |
| 8 |
=1110÷[24-21],
=1110÷3,
=370.
点评:本题考查了学生根据不同类型的题目,选择正确的简便算法的灵活计算的能力.
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