选择正确的单词填入括号中并在下面的横线上写出算式。

（1）Thirteen plus ________ equals twenty-five.
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（2）_______ plus eight equals forty-eight.
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（3）Forty –five plus fifty-five equals ____________.
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（4）Twenty-four plus _______ equals eight-two.
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（5）Eight plus two equals __________.
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