题目内容
(2010?游仙区模拟)计算,能简算的要简算.
| ①8.32×101-8.32 | ②6.75-1
|
③
|
④(
|
分析:①8.32×101-8.32,运用乘法分配律进行简算;
②6.75-1
+3.25-2
,根据加、减法的运算性质进行简算;
③
×(
+
),运用乘法分配律进行简算;
④(
+25%)÷
+0.7.根据分数四则混合运算的顺序,按照分数四则运算的计算法则进行计算.
②6.75-1
| 1 |
| 6 |
| 5 |
| 6 |
③
| 2 |
| 3 |
| 1 |
| 6 |
| 1 |
| 3 |
④(
| 4 |
| 5 |
| 7 |
| 3 |
解答:解:①8.32×101-8.32,
=8.32×(101-1),
=8.32×100,
=832;
②6.75-1
+3.25-2
,
=6.75+3.25-(1
+2
),
=10-4,
=6;
③
×(
+
),
=
×
+
×
,
=
+
,
=
,
=
;
④(
+25%)÷
+0.7.
=(
+
)×
+0.7,
=
×
+0.7,
=
+0.7,
=0.45+0.7,
=1.15.
=8.32×(101-1),
=8.32×100,
=832;
②6.75-1
| 1 |
| 6 |
| 5 |
| 6 |
=6.75+3.25-(1
| 1 |
| 6 |
| 5 |
| 6 |
=10-4,
=6;
③
| 2 |
| 3 |
| 1 |
| 6 |
| 1 |
| 3 |
=
| 2 |
| 3 |
| 1 |
| 6 |
| 2 |
| 3 |
| 1 |
| 3 |
=
| 1 |
| 9 |
| 2 |
| 9 |
=
| 3 |
| 9 |
=
| 1 |
| 3 |
④(
| 4 |
| 5 |
| 7 |
| 3 |
=(
| 4 |
| 5 |
| 1 |
| 4 |
| 3 |
| 7 |
=
| 21 |
| 20 |
| 3 |
| 7 |
=
| 9 |
| 20 |
=0.45+0.7,
=1.15.
点评:此题考查的目的是掌握整数、分数、小数四则混合运算的运算顺序和它们的计算法则,并且能够灵活选择简便方法进行计算.
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