名词
中文翻译：减法器
同义词：
['subtractor', 'subtractor device']
例句：
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1. The calculator has an adder-subtracter built in to make calculations easier.
这款计算器内置了加法器和减法器，使计算更加便捷。
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2. The teacher used the adder-subtracter to help her students understand the concept of multiplication.
老师利用这个减法器帮助学生理解乘法的概念。
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3. The engineer designed a new adder-subtracter that could perform complex calculations with high precision.
工程师设计了一种新型的减法器，能够以高精度执行复杂的计算任务。