题目内容

仿照例子写句子。
例:  Two rabbits plus thirteen rabbits equals fifteen rabbits.
1.  _____________________________________________________
2.  _____________________________________________________
3.  _____________________________________________________
1. Ten pigs plus twenty pigs equals thirty pigs.
2. Twelve cows plus fifteen cows equals twenty-seven cows.
3. Twenty-one ducks plus nineteen ducks equals forty ducks.
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