subtract adder 中文意思是什麼
subtract adder
解釋
減法加法器-
The main error patterns in one - step word problems were " posing the adder and subtract problems " and " posing unknown number as known number "
五、單步驟題型擬題錯誤類型主要為: 1 .擬出加減之題目; 2 .將未知數當作已知數加以擬題。
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