389-198-89-101
=389-89-(198+101)
=300-299
=1
猜你喜欢
- 1Further,for those problems like global warming and terrorism which are having a deterring effect on our society,so much
- 2△ABC是等边三角形 O是△ABC的一点 OA=5 OB=4 OC=3 试求△BOC度数
- 3若数列{an}的通项公式是a1=(-1)^n×(2n-1),则a1+a2+a3+…+a100=?
- 422,35,56,90,( ),234.A.162 B.156 C.148 D.145
- 5go straight on ,then turn right at the first crossing.(改为同义句)
- 6从冰箱取出一些-10摄氏度的冰块,放在不锈钢杯中,一段时间能否结霜?为什么?
- 7黄金的重量单位
- 8NaCl中混有少量硝酸钾,可用蒸发结晶提纯,但能将NaCl全部提纯吗,为什么?
- 9交通工具给人们带来了什么方便
- 10The rain can make the plants ( )better.A.grow B.to grow C.grows D.growing