计算1-2+3-4+.+2007-2008+2009-2010
计算1-2+3-4+.+2007-2008+2009-2010
还有(-1)+2-3+4-5+6-......-99+100
还有(-1)+2-3+4-5+6-......-99+100
数学人气:488 ℃时间:2019-10-31 03:08:11
优质解答
1-2+3-4+.+2007-2008+2009-2010=(1-2)+(3-4).+(2007-2008)+(2009-2010)=-1+-1+.-1+-1=-1(2010÷2)=-1005 第二道(-1)+2-3+4-5+6-.-99+100=(2-1)+(4-3)+(6-5)+…+(100-99)=1*50=50 以后有问题直接...
我来回答
类似推荐
猜你喜欢
- 1My friend Li Ming have had a problem these days对吗
- 2Mary is one of my good friends.(改为同义句)
- 3跪求高手帮我翻译The english language would not have been what it is (if the English had not been for centuries great respecters
- 4Let's go to Hong Shanhu.That is a good place __ hang around
- 5将横截面是正方体,长是50cm的长方体横截成3段后,表面积会增加36cm2,原来这个长方
- 61加负5分之6等于多少?
- 7it is time to go to bed如何转成it is time for
- 84x-5分之1x=1.9 2.4×5-3x=8 7分之6x-4.2×5=21
- 9一块长12米,宽0.9米的长方形铁皮,剪成直径是15厘米的圆片,最多可剪几块
- 10苯甲醚的结构式