题目

计算2﹣5=_____；4×（﹣）=_____；（﹣2）÷（﹣）=_____；﹣（﹣2）2=_____． 答案：【答案】 ﹣3 ﹣2 6 ﹣4．【解析】根据有理数的加法、乘法、除法、乘方运算法则依次计算.2－5＝－（5－2）＝－3；4×（﹣）=-()=-2;（﹣2）÷（﹣）=+()=-6;﹣（﹣2）2=-(-2) ×(-2)=-4.故答案是：-3,-2,6,-4.______, he always makes time for his family.A. No matter he is busy        B. No matter how busy he isC. However he is busy         C. However busy is he