diff --git a/parts/language/lang_es.lua b/parts/language/lang_es.lua
index 66130f19..72122ff6 100644
--- a/parts/language/lang_es.lua
+++ b/parts/language/lang_es.lua
@@ -611,6 +611,9 @@ return{
             reset="Reiniciar",
             invis="A ciegas",
         },
+        app_arithmetic={
+            reset="Reiniciar",
+        },
         savedata={
             export="Exportar al portapapeles",
             import="Importar de portapapeles",
diff --git a/parts/language/lang_fr.lua b/parts/language/lang_fr.lua
index 3f9ac22d..72625b21 100644
--- a/parts/language/lang_fr.lua
+++ b/parts/language/lang_fr.lua
@@ -612,6 +612,9 @@ return{
             reset="Réinitialiser",
             invis="Aveugler",
         },
+        app_arithmetic={
+            reset="Réinitialiser",
+        },
         savedata={
             -- export="Export to clipboard",
             -- import="Import from clipboard",
diff --git a/parts/language/lang_pt.lua b/parts/language/lang_pt.lua
index eb407388..a5fe6506 100644
--- a/parts/language/lang_pt.lua
+++ b/parts/language/lang_pt.lua
@@ -642,6 +642,9 @@ return{
             reset="Resetar",
             invis="Cego",
         },
+        app_arithmetic={
+            reset="Resetar",
+        },
         savedata={
             -- export="Export to clipboard",
             -- import="Import from clipboard",
diff --git a/parts/language/lang_zh.lua b/parts/language/lang_zh.lua
index 37390db1..089eb657 100644
--- a/parts/language/lang_zh.lua
+++ b/parts/language/lang_zh.lua
@@ -656,6 +656,9 @@ return{
             reset="重置",
             invis="盲打",
         },
+        app_arithmetic={
+            reset="重置",
+        },
         savedata={
             export="导出到剪切板",
             import="从剪切板导入",
diff --git a/parts/language/lang_zh_grass.lua b/parts/language/lang_zh_grass.lua
index fd17f325..b72f08d8 100644
--- a/parts/language/lang_zh_grass.lua
+++ b/parts/language/lang_zh_grass.lua
@@ -413,7 +413,6 @@ return{
             ihs="初始持有",
             irs="初始旋转",
             ims="初始运动",
-            reset="重置",
         },
         setting_key={
             a1="向左移动",
@@ -614,7 +613,6 @@ return{
             revKB="逆转",
         },
         app_schulteG={
-            reset="重置",
             rank="大小",
             invis="英维斯",
             disappear="隐藏",
@@ -626,30 +624,25 @@ return{
         app_AtoZ={
             level="水平仪",
             keyboard="键盘",
-            reset="重置",
         },
         app_2048={
-            reset="重置",
             invis="英维斯",
             tapControl="抽头控制",
 
             skip="跳转",
         },
         app_ten={
-            reset="重置",
             next="下一个",
             invis="英维斯",
             fast="快速的",
         },
         app_dtw={
-            reset="重置",
             color="颜色",
             mode="模式",
             bgm="血糖监测",
             arcade="游乐中心",
         },
         app_link={
-            reset="重置",
             invis="英维斯",
         },
         savedata={
diff --git a/parts/language/lang_zh_trad.lua b/parts/language/lang_zh_trad.lua
index 538be68f..6bd5caab 100644
--- a/parts/language/lang_zh_trad.lua
+++ b/parts/language/lang_zh_trad.lua
@@ -655,6 +655,9 @@ return{
             reset="重設",
             invis="盲打",
         },
+        app_arithmetic={
+            reset="重設",
+        },
         savedata={
             export="導出到剪貼板",
             import="從剪貼板導入",
diff --git a/parts/scenes/app_arithmetic.lua b/parts/scenes/app_arithmetic.lua
index a07d595f..9071c1ac 100644
--- a/parts/scenes/app_arithmetic.lua
+++ b/parts/scenes/app_arithmetic.lua
@@ -3,6 +3,8 @@ local rnd=math.random
 local int,ceil=math.floor,math.ceil
 local char=string.char
 
+local timing,time
+
 local function b2(i)
     if i==0 then return 0 end
     local s=""
@@ -114,17 +116,27 @@ local levels={
         local a=rnd(17,int(s/2))
         return{COLOR.J,b16(a),COLOR.Z,"+",COLOR.J,b16(s-a)},s
     end,nil,nil,
-    function()return "Coming S∞n"..(rnd()<.5 and""or" "),1e99 end,
+    function()timing=false return "Coming S∞n"..(rnd()<.5 and""or" "),1e99 end,
 }setmetatable(levels,{__index=function(self,k)return self[k-1]end})
 
 local level
 
 local input,inputTime=0,0
 local question,answer
+
 local function newQuestion(lv)
     return levels[lv]()
 end
 
+local function reset()
+    timing=true
+    time=0
+    input=""
+    inputTime=0
+    level=1
+    question,answer=newQuestion(1)
+end
+
 local function check(val)
     if val==answer then
         level=level+1
@@ -142,10 +154,7 @@ end
 local scene={}
 
 function scene.sceneInit()
-    input=""
-    inputTime=0
-    level=1
-    question,answer=newQuestion(1)
+    reset()
     BGM.play('truth')
 end
 
@@ -173,14 +182,15 @@ function scene.keyDown(key,isRep)
     elseif key=="backspace"then
         input=""
         inputTime=0
-    elseif key=="s"then
-        check(answer)
+    elseif key=="r"then
+        reset()
     elseif key=="escape"then
         SCN.back()
     end
 end
 
 function scene.update(dt)
+    if timing then time=time+dt end
     if inputTime>0 then
         inputTime=inputTime-dt
         if inputTime<=0 then
@@ -189,8 +199,11 @@ function scene.update(dt)
     end
 end
 function scene.draw()
-    FONT.set(35)
     gc.setColor(COLOR.Z)
+    FONT.set(45)
+    gc.print(("%.3f"):format(time),1026,70)
+
+    FONT.set(35)
     GC.mStr("["..level.."]",640,30)
 
     FONT.set(100)
@@ -203,6 +216,7 @@ function scene.draw()
 end
 
 scene.widgetList={
+    WIDGET.newButton{name='reset',x=155,y=100,w=180,h=100,color='lG',font=40,code=pressKey"r"},
     WIDGET.newKey{name='X',x=540,y=620,w=90,font=60,fText="X",code=pressKey"backspace"},
     WIDGET.newKey{name='0',x=640,y=620,w=90,font=60,fText="0",code=pressKey"0"},
     WIDGET.newKey{name='-',x=740,y=620,w=90,font=60,fText="-",code=pressKey"-"},