請用英文數(shù)字完成下列等式。
1. thirty-eleven=                 _________
2. twelve + eight=              _________
3. sixteen-ten + seven=       _________
4. nine + six-one=              _________
5. eighteen-five + one=       _________
6. seven + three + twenty= _________
1. nineteen 2. twenty 3. thirteen 4. fourteen 5. fourteen 6. thirty
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