题目

以下是一位同学所做的有理数运算解题过程的一部分： （1） 请你在上面的解题过程中仿照给出的方式，圈出他的不符合题意之处,并将符合题意结果写在相应的圈内． （2） 以上解答反映出了该同学有理数运算的问题，请你注意避错完成下面的计算．计算： ． 答案：解：如图所示： 解：原式= −1−12+12+3+24×(−19) = 2−83= −23单句改错。(     ) 1. A bike runs many more slowly than a bus.(     ) 2. The girl has fallen asleep for three hours.(     ) 3. The boy looks very worrying.(     ) 4. The girl has finished to do her homework.(     ) 5. Thank you for give me the nice present.(     ) 6. It's a long time since we have met last.(     ) 7. Help yourself to some fish,children.(     ) 8. Which would you like, a pen and a pencil?(     ) 9. I can't find the key of my house.(     ) 10. My parents maybe at home.