用英语写出下列数学算式。
1. 20－11=?____
2. 69－23=?
3. 321－123=?
4. 45 +74=?
参考答案：
1. What's twenty minus eleven?
2. What's sixty-nine minus twenty-three?
3. What's three hundred and twenty-one minus one hundred and twenty-three?
4. What's forty-five plus/and seventy-four? |
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