x的3倍等于12,x为9.______.(判断对错)
由题意知,
3x=12,
3x÷3=12÷3,
x=4;
所以x的3倍等于12,x为9是错误的;
故答案为:×.
将下列句子中错误找出并改正。
( ) 1. Did you finished your work two hours ago? ____________
A B C D
( ) 2. This sweater is very nice. You can try on its. ____________
( ) 3. Jim sent an e-mail to she yesterday. ____________
( ) 4. Was your brother a basketball player three years ago? No, he didn't. ____________
( ) 5. There are some bookshops on the two floor of the mall. _____________
That happened _______ a Monday morning.
A.at
B.in
C.for
D.on