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subtraction的音标：subtraction的英式发音音标为：[səb'trækʃn]subtraction的美式发音音标为：[səb'trækʃən]...
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The plus sign is used in addition and the minus is used in subtraction.加号用于加法;减号用于减法....using concrete objects to teach addition and subtraction.用实物来教加减法There will be simple tests in addition, subtraction, multiplication...
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I looked at what he'd given me and did a quick subtraction.我看着他给我的东西，快速做了个减法。The difference is found by subtraction.用减法得出差额.The plus sign is used in addition and the minus is used in subtraction.加号用于加法;减号用于减法....
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subtraction的复数形式为：subtractions...