1+2+3+4+5-6+7+8+9-10-11-12=0
假如可以用括号
(12+1+11+2+10+3)-(9+4+8+5+7+6)=0
钟表上有12个数字,在某些数前加上负号,12数和等于0
钟表上有12个数字,在某些数前加上负号,12数和等于0
数学人气:909 ℃时间:2019-10-19 16:23:05
优质解答
我来回答
类似推荐
猜你喜欢
- 1一个平行四边形相邻两条边的和是15厘米,这个平行四边形的周长是多少厘米?
- 2几道数学题(小学六年级的,速度)
- 3.She was too excited to do any housework that morning,for in the evening she would be going to a fancy-dress party with
- 4Tom is six years old.Bill is twelve years old.(保持句意不变)Bill is ( )Tom’s ( ).`
- 5体细胞中含有一个染色体组的个体一定是单倍体
- 6how is the weather in beijing的中文意思
- 7求自我介绍类型的小作文.新学期开学用的.
- 8已知D是三角形ABC的边BC上的一点,DE平行AB,DF平行AC,求证∠EDF=∠A
- 9把下面的小数化成分数 0.2 0.85
- 10These clothes are very cheap.They are____________.