假如你家有一个农场，统计一下农场里动物的数量：
10只母鸡， 13头猪， 12只鸭子， 14只绵羊， 10匹马， 15头奶牛
Now we have ___________________________________________________________________
_____________________________________________________________________________________________________________________________________________________________.

从方框中选出合适的词填空。
minus  fifty  markers  plus  erasers
1. I have many ________. I can draw pictures with them.
2. He has three ________.
3. My friend Jim has ________ books.
4. Ten ________ twenty is thirty.
5. Ninety ________ thirty is sixty.

将下列单词与对应的数字连接起来。
five    four three    eight nine seven six    one ten two
2 5 1 3 7 9 4 6 10 8

three + seven=__________（   ）

A．twelve

B．nine

C．ten

There are _____ days in February. (   )

A．20

B．29

C．28

D．Both B and C