题目内容
(2009?徐州)脱式计算.
| 5400-2940÷28×27 |
|
|
分析:(1)、(3)整数四则混合运算顺序进行计算即可.(2)运用乘法分配律简便计算即可.
解答:解:(1)5400-2940÷28×27,
=5400-105×27,
=5400-2835,
=2565;
(2)
×
+
÷4,
=
×
+
×
,
=
×(
+
),
=
;
(3)
÷[2-(
+
)],
=
÷[2-
],
=
÷
,
=
.
=5400-105×27,
=5400-2835,
=2565;
(2)
| 1 |
| 4 |
| 3 |
| 7 |
| 4 |
| 7 |
=
| 1 |
| 4 |
| 3 |
| 7 |
| 4 |
| 7 |
| 1 |
| 4 |
=
| 1 |
| 4 |
| 3 |
| 7 |
| 4 |
| 7 |
=
| 1 |
| 4 |
(3)
| 11 |
| 18 |
| 1 |
| 4 |
| 5 |
| 6 |
=
| 11 |
| 18 |
| 13 |
| 12 |
=
| 11 |
| 18 |
| 11 |
| 12 |
=
| 2 |
| 3 |
点评:此题主要考查整数的四则混合运算的运算顺序和应用运算定律进行简便计算.
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