若1,3,x,5,6五个数的平均数为4.则x的值为______.
∵1,3,x,5,6五个数的平均数为4,
∴1+3+x+5+6=4×5,
解得x=5.
故答案为:5.
句型转换。
1. They are English books. (变为单数句子)
_____ _____ _____ English book.
2. There are some American friends in our school. (改为一般疑问句)
_____ there _____ American friends in your school?
3. Jenny wants to see a comedy today. (改为否定句 )
Jenny _____ _____ to see a comedy today .
4. His parents can play the drums very well. (对划线部分提问)
_____ _____ his parents play very well?
5. Jeff''s favorite food is chicken. (改为同义句)
Jeff _____ chicken _____.
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