题目内容
|
| ||||||||||||||
87×
| （
|
（1）
×
+
÷
=
×
+
×
=
×（
+
）
=
×1
=
；
（2）
÷（
-
）
=
÷
=
×
=
；
（3）87×
=（88-1）×
=88×
-
=13-
=12
；
（4）（
-
）×23×35
=
×23×35-
×23×35
=70-46
=24．
| 7 |
| 18 |
| 1 |
| 4 |
| 3 |
| 4 |
| 18 |
| 7 |
=
| 7 |
| 18 |
| 1 |
| 4 |
| 3 |
| 4 |
| 7 |
| 18 |
=
| 7 |
| 18 |
| 1 |
| 4 |
| 3 |
| 4 |
=
| 7 |
| 18 |
=
| 7 |
| 18 |
（2）
| 12 |
| 7 |
| 2 |
| 3 |
| 1 |
| 4 |
=
| 12 |
| 7 |
| 5 |
| 12 |
=
| 12 |
| 7 |
| 12 |
| 5 |
=
| 144 |
| 35 |
（3）87×
| 13 |
| 88 |
=（88-1）×
| 13 |
| 88 |
=88×
| 13 |
| 88 |
| 13 |
| 88 |
=13-
| 13 |
| 88 |
=12
| 75 |
| 88 |
（4）（
| 2 |
| 23 |
| 2 |
| 35 |
=
| 2 |
| 23 |
| 2 |
| 35 |
=70-46
=24．
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