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用递等式计算．①2450-450÷18×25②25×12+910÷920③516+（716-14）÷12④115÷[（23+15）×126]．
题目详情
用递等式计算．
①2450-450÷18×25
②
×
+
÷
③
+（
-
）÷
④
÷[（
+
）×
]．
×
+
÷
③
+（
-
）÷
④
÷[（
+
）×
]．
2 2 5 5
+
÷
③
+（
-
）÷
④
÷[（
+
）×
]．
1 1 2 2
÷
③
+（
-
）÷
④
÷[（
+
）×
]．
9 9 10 10
③
+（
-
）÷
④
÷[（
+
）×
]．
9 9 20 20
+（
-
）÷
④
÷[（
+
）×
]．
5 5 16 16
-
）÷
④
÷[（
+
）×
]．
7 7 16 16
）÷
④
÷[（
+
）×
]．
1 1 4 4
④
÷[（
+
）×
]．
1 1 2 2
÷[（
+
）×
]．
1 1 15 15
+
）×
]．
2 2 3 3
）×
]．
1 1 5 5
]．
1 1 26 26
①2450-450÷18×25
②
| 2 |
| 5 |
| 1 |
| 2 |
| 9 |
| 10 |
| 9 |
| 20 |
③
| 5 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
④
| 1 |
| 15 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 26 |
| 2 |
| 5 |
| 1 |
| 2 |
| 9 |
| 10 |
| 9 |
| 20 |
③
| 5 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
④
| 1 |
| 15 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 26 |
| 2 |
| 5 |
| 1 |
| 2 |
| 9 |
| 10 |
| 9 |
| 20 |
③
| 5 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
④
| 1 |
| 15 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 26 |
| 1 |
| 2 |
| 9 |
| 10 |
| 9 |
| 20 |
③
| 5 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
④
| 1 |
| 15 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 26 |
| 9 |
| 10 |
| 9 |
| 20 |
③
| 5 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
④
| 1 |
| 15 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 26 |
| 9 |
| 20 |
| 5 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
④
| 1 |
| 15 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 26 |
| 5 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
④
| 1 |
| 15 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 26 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
④
| 1 |
| 15 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 26 |
| 1 |
| 4 |
| 1 |
| 2 |
④
| 1 |
| 15 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 26 |
| 1 |
| 2 |
| 1 |
| 15 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 26 |
| 1 |
| 15 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 26 |
| 2 |
| 3 |
| 1 |
| 5 |
| 1 |
| 26 |
| 1 |
| 5 |
| 1 |
| 26 |
| 1 |
| 26 |
▼优质解答
答案和解析
①2450-450÷18×25，=2450-25×25，=2450-625，=1825；②25×12+910÷920，=15+910×209，=15+2，=215；③516+（716-14）÷12，=516+（716−416）×2，=516+316×2，=516+616，=1116；④115÷[（23+15）×126]，=11...
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