题目内容
(2013?涪城区)计算下列各题:
| ①17.09-3.63-6.37+0.91 | ②10÷〔
| ||||||||||
③198÷
|
④
|
分析:①运用加法的结合律及结合律进行解答即可②④运用分数的四则混合运算的顺序进行计算即可.③运用乘法的分配律进行计算即可.
解答:解:①17.09-3.63-6.37+0.91,
=(17.09+0.91)-(3.63+6.37),
=18-10,
=8;
②10÷〔
-(
÷
+
)〕,
=10÷[
-(
×
+
)],
=10÷[
-
],
=10÷[
-
],
=10÷
,
=10×
,
=37.5;
③198÷
+202×
,
=198×
+202×
,
=
×(198+202),
=300;
④
×〔1÷(
-
)〕,
=
×〔1÷
〕,
=
×
,
=2.5;
=(17.09+0.91)-(3.63+6.37),
=18-10,
=8;
②10÷〔
| 8 |
| 3 |
| 5 |
| 13 |
| 5 |
| 26 |
| 2 |
| 5 |
=10÷[
| 8 |
| 3 |
| 5 |
| 13 |
| 26 |
| 5 |
| 2 |
| 5 |
=10÷[
| 8 |
| 3 |
| 12 |
| 5 |
=10÷[
| 40 |
| 15 |
| 36 |
| 15 |
=10÷
| 4 |
| 15 |
=10×
| 15 |
| 4 |
=37.5;
③198÷
| 4 |
| 3 |
| 3 |
| 4 |
=198×
| 3 |
| 4 |
| 3 |
| 4 |
=
| 3 |
| 4 |
=300;
④
| 7 |
| 8 |
| 7 |
| 10 |
| 7 |
| 20 |
=
| 7 |
| 8 |
| 7 |
| 20 |
=
| 7 |
| 8 |
| 20 |
| 7 |
=2.5;
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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