diff --git a/备课组/26届/校本材料.json b/备课组/26届/校本材料.json
index a862ae23..c8992b56 100644
--- a/备课组/26届/校本材料.json
+++ b/备课组/26届/校本材料.json
@@ -1923,7 +1923,7 @@
         "G20260146": {
             "id": "G20260146",
             "name": "等差数列的前$n$项和",
-            "filename": "等差数列的前$n$项和",
+            "filename": "等差数列的前n项和",
             "objects": [
                 "K0402001X",
                 "K0402002X",
@@ -2012,7 +2012,7 @@
         "G20260148": {
             "id": "G20260148",
             "name": "等比数列的前$n$项和(1)",
-            "filename": "等比数列的前$n$项和(1)",
+            "filename": "等比数列的前n项和(1)",
             "objects": [
                 "K0404001X",
                 "K0404002X",
@@ -2054,7 +2054,7 @@
         "G20260149": {
             "id": "G20260149",
             "name": "等比数列的前$n$项和(2)",
-            "filename": "等比数列的前$n$项和(2)",
+            "filename": "等比数列的前n项和(2)",
             "objects": [
                 "K0405001X",
                 "K0405002X",
@@ -2255,7 +2255,7 @@
         "G20260154": {
             "id": "G20260154",
             "name": "用迭代序列求$\\sqrt{2}$的近似值",
-            "filename": "用迭代序列求$\\sqrt{2}$的近似值",
+            "filename": "用迭代序列求根号2的近似值",
             "objects": [
                 "K0410001X",
                 "K0410002X"