Update task.md

leviding · web-flow · commit e29fd63667bb · 2019-10-22T19:41:48.000+08:00
diff --git a/1-js/02-first-steps/06-type-conversions/1-primitive-conversions-questions/task.md b/1-js/02-first-steps/06-type-conversions/1-primitive-conversions-questions/task.md
@@ -17,10 +17,11 @@ true + false
 "4" - 2
 "4px" - 2
 7 / 0
-"  -9\n" + 5
-"  -9\n" - 5
+"  -9  " + 5
+"  -9  " - 5
 null + 1
 undefined + 1
+" \t \n" - 2
 ```
 
 好好思考一下，把它们写下来然后和答案比较一下。
