[請益] 小四面積
長方形的長為5公分寬為4公分,求其面積?
解題過程為以下這樣
5x4=20(cm^2) 或者 5cm x 4cm =20(cm^2)
這是之前試教的時候遇到的一個問題
那時評審老師問為什麼cm x cm會變成 cm^2 ????
我當下毫無頭緒也不曉得該如何解釋
煩請各位有經驗的老師幫忙解惑一下 謝謝!!!
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