题目内容
给算式找朋友．（把计算结果相同的算式用线连起来．）
分析：按照运算顺序，结合运算定律，算出结果，比较结果得出答案即可．
解答：解：
×
+2
=
+2
=2
；
×5+
=
+
=
；
55×
=（56-1）×
=56×
-1×
=55-
=54
；
×
×
=
；
9×（
-
）
=9×
=
；
6×9+
=54
．
| 4 |
| 5 |
| 5 |
| 6 |
=
| 2 |
| 3 |
=2
| 2 |
| 3 |
| 3 |
| 10 |
| 3 |
| 10 |
=
| 3 |
| 2 |
| 3 |
| 10 |
=
| 9 |
| 5 |
55×
| 55 |
| 56 |
=（56-1）×
| 55 |
| 56 |
=56×
| 55 |
| 56 |
| 55 |
| 56 |
=55-
| 55 |
| 56 |
=54
| 1 |
| 56 |
| 2 |
| 7 |
| 9 |
| 5 |
| 7 |
| 2 |
=
| 9 |
| 5 |
9×（
| 2 |
| 3 |
| 10 |
| 27 |
=9×
| 8 |
| 27 |
=
| 8 |
| 3 |
6×9+
| 1 |
| 56 |
=54
| 1 |
| 56 |
点评：分数四则混合运算，关键是抓住运算顺序，正确利用运算定律简算．
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