题目内容
下面各题，怎样算简便就怎样算．
|
|
| ||||||||||||||||||||
1-
|
| （
|
①
+
+
+
=（
+
）+（
+
）
=1+1
=2；
②
×
+
×
=
×（
+
）
=
×1
=
；
③
÷0.8÷
=
÷
÷
=
×
×12
=9；
④1-
÷
=1-
×
=1-
=
；
⑤
÷4×
=
×
×
=
；
⑥（
-
）×36
=
×36-
×36
=21-10
=11．
| 5 |
| 9 |
| 3 |
| 11 |
| 4 |
| 9 |
| 8 |
| 11 |
=（
| 5 |
| 9 |
| 4 |
| 9 |
| 3 |
| 11 |
| 8 |
| 11 |
=1+1
=2；
②
| 7 |
| 18 |
| 1 |
| 4 |
| 3 |
| 4 |
| 7 |
| 18 |
=
| 7 |
| 18 |
| 1 |
| 4 |
| 3 |
| 4 |
=
| 7 |
| 18 |
=
| 7 |
| 18 |
③
| 3 |
| 5 |
| 1 |
| 12 |
=
| 3 |
| 5 |
| 4 |
| 5 |
| 1 |
| 12 |
=
| 3 |
| 5 |
| 5 |
| 4 |
=9；
④1-
| 7 |
| 9 |
| 7 |
| 8 |
=1-
| 7 |
| 9 |
| 8 |
| 7 |
=1-
| 8 |
| 9 |
=
| 1 |
| 9 |
⑤
| 8 |
| 13 |
| 5 |
| 6 |
=
| 8 |
| 13 |
| 1 |
| 4 |
| 5 |
| 6 |
=
| 5 |
| 39 |
⑥（
| 7 |
| 12 |
| 5 |
| 18 |
=
| 7 |
| 12 |
| 5 |
| 18 |
=21-10
=11．
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