题目内容
(2010?尤溪县模拟)(1)1
×[(
+0.25)÷(
-
)]
(2)[11.9-3.4×(10.802-9.802)]÷85%
(3)10÷25+2
×0.4-1
(4)(8
-10.5×
)×(3
+7.5).
| 7 |
| 9 |
| 3 |
| 8 |
| 5 |
| 6 |
| 5 |
| 9 |
(2)[11.9-3.4×(10.802-9.802)]÷85%
(3)10÷25+2
| 1 |
| 2 |
| 2 |
| 5 |
(4)(8
| 2 |
| 5 |
| 4 |
| 5 |
| 1 |
| 6 |
分析:根据整数、分数、小数和百分数的四则混合运算进行计算即可得到答案.
解答:解:(1)1
×[(
+0.25)÷(
-
)],
=1
×[(
+
)÷(
-
)],
=1
×[
÷
],
=1
×
,
=4;
(2)[11.9-3.4×(10.802-9.802)]÷85%,
=[11.9-3.4×1]÷0.85,
=[11.9-3.4]÷0.85,
=8.5÷0.85,
=10;
(3)10÷25+2
×0.4-1
=0.4+2.5×0.4-1.4,
=0.4+1-1.4,
=1.4-1.4,
=0;
(4)(8
-10.5×
)×(3
+7.5)
=(8
-8.4)×(3
+7
),
=0×10
,
=0.
| 7 |
| 9 |
| 3 |
| 8 |
| 5 |
| 6 |
| 5 |
| 9 |
=1
| 7 |
| 9 |
| 3 |
| 8 |
| 1 |
| 4 |
| 15 |
| 18 |
| 10 |
| 18 |
=1
| 7 |
| 9 |
| 5 |
| 8 |
| 5 |
| 18 |
=1
| 7 |
| 9 |
| 9 |
| 4 |
=4;
(2)[11.9-3.4×(10.802-9.802)]÷85%,
=[11.9-3.4×1]÷0.85,
=[11.9-3.4]÷0.85,
=8.5÷0.85,
=10;
(3)10÷25+2
| 1 |
| 2 |
| 2 |
| 5 |
=0.4+2.5×0.4-1.4,
=0.4+1-1.4,
=1.4-1.4,
=0;
(4)(8
| 2 |
| 5 |
| 4 |
| 5 |
| 1 |
| 6 |
=(8
| 2 |
| 5 |
| 1 |
| 6 |
| 1 |
| 2 |
=0×10
| 2 |
| 3 |
=0.
点评:此题主要考查的是整数、分数、小数和百分数的四则混合运算.
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