diff --git a/flush.rb b/flush.rb
old mode 100644
new mode 100755
index 6c03b51..4c82049
--- a/flush.rb
+++ b/flush.rb
@@ -1,12 +1,13 @@
 #!/usr/bin/env ruby
+# coding: utf-8
 
 kotae = 0
 i = 0
 while i<10
-  x = rand(30)+20
+  x = rand(900)+100
   kotae += x
   printf("\r%d ", x)
-  sleep(1)
+  sleep(0.8)
   printf("\r     ")
   sleep(0.2)
   i += 1
diff --git a/keisan.rb b/keisan.rb
index fe43784..5605a15 100755
--- a/keisan.rb
+++ b/keisan.rb
@@ -78,7 +78,8 @@
             puts("正解!")
             seikaisuu+=1
             redo
-          else                                                                               puts("不正解...")
+          else
+            puts("不正解...")
             printf("答えは%dだよ!\n", kazuiti*kazuni)
             printf("%d問正解したよ!!\n", seikaisuu)
             break
@@ -157,8 +158,104 @@
     end
     break
   end
+
+
+  print("選択:")
+  sentaku = gets.chomp.to_i
+  if sentaku == 2
+    puts("わり算 選択画面")
+    puts("1:1,2桁/1桁")
+    puts("2:2,3桁/1桁")
+    puts("3:2,3桁/2桁")
+    puts("4:3,4桁/1桁")
+    puts("5:3,4桁/2桁")
+    puts("6:3,4桁/3桁")
+    puts("7:4,5桁/1桁")
+    puts("8:4,5桁/2桁")
+    puts("9:4,5桁/3桁")
+    puts("10:4,5桁/4桁")
+    puts("11:5,6桁/1桁")
+    puts("12:5,6桁/2桁")
+    puts("13:5,6桁/3桁")
+    puts("14:5,6桁/4桁")
+    puts("15:5,6桁/5桁")
+
+    while true
+      print("選択:")
+      sentaku = gets.chomp.to_i
+      if sentaku == 1
+        while true
+          kazuiti = rand(9) + 1
+          kazuni = rand(9) + 1
+          kazusan = kazuiti*kazuni
+          printf("%d/%d\n", kazusan, kazuni)
+          print("答えを入力:")
+          kotae = gets.chomp.to_i
+          if kotae == kazusan/kazuni
+            puts("正解!")
+            seikaisuu+=1
+            redo
+          else
+            puts("不正解...")
+            printf("答えは%dだよ!\n", kazusan/kazuni)
+            printf("%d問正解したよ!!\n", seikaisuu)
+            break
+          end
+          break
+        end
+        break
+      end
+
+      if sentaku == 2
+        while true
+          kazuiti = rand(90) + 10
+          kazuni = rand(9) + 1
+          kazusan = kazuiti*kazuni
+          printf("%d/%d\n", kazusan, kazuiti)
+          print("答えを入力:")
+          kotae = gets.chomp.to_i
+          if kotae == kazusan/kazuiti
+            puts("正解!")
+            seikaisuu+=1
+            redo
+          else
+            puts("不正解...")
+            printf("答えは%dだよ!\n", kazusan/kazuiti)
+            printf("%d問正解したよ!!\n", seikaisuu)
+            break
+          end
+          break
+        end
+        break
+      end
+      break
+    end
+
+    if sentaku == 3
+      while true
+        kazuiti = rand(90) + 10
+        kazuni = rand(9) + 1
+        kazusan = kazuiti*kazuni
+        printf("%d/%d\n", kazusan, kazuni)
+        print("答えを入力:")
+        kotae = gets.chomp.to_i
+        if kotae == kazusan/kazuni
+          puts("正解!")
+          seikaisuu+=1
+          redo
+        else
+          puts("不正解...")
+          printf("答えは%dだよ!\n", kazusan/kazuni)
+          printf("%d問正解したよ!\n", seikaisuu)
+          break
+        end
+        break
+      end
+      break
+    end
+    break
+  end
   break
 end
-      
-   
-  
+
+