風傳媒國小數學考5x10，回答50被老師劃掉！網見正確答案秒懂：這種算法才正確
未署名
<![CDATA[<img src="https://image.cache.storm.mg/styles/smg-150x150-fp/s3/media/image/2020/08/24/20200824-122737_U13380_M633968_0438.jpg?itok=dwAvvgsL"...
<![CDATA[<img src="https://image.cache.storm.mg/styles/smg-150x150-fp/s3/media/image/2020/08/24/20200824-122737_U13380_M633968_0438.jpg?itok=dwAvvgsL"...