一加二等于几？
Then F is one minus one plus two, is equal to two.
那么F等于1减去1再加上2。
"Nothing, Mum," answered the son proudly, "instead, she asked me how much one plus two was, and I told her three."
独生子骄傲地说：“什么也没教，妈妈，她反倒问我一加二等于多少，我告诉她是三。”
一加二等于三。
One plus two is three. Six minus four is two.
一加二等于三。六减四等于二。
One plus two is three. Six minus four is two.
一加二等于三。六减四等于二。
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