钟面上有1~12个数字,你····1+(-2)+3+(-4)+5+(-6)+(-7)+8+(-9)+10+(-11)+12=0 ; 1+2+3+4+5+(-6)+7+8+9+(-10)+(-11)+(-12)=0.有什么规律?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/22 16:27:24
![钟面上有1~12个数字,你····1+(-2)+3+(-4)+5+(-6)+(-7)+8+(-9)+10+(-11)+12=0 ; 1+2+3+4+5+(-6)+7+8+9+(-10)+(-11)+(-12)=0.有什么规律?](/uploads/image/z/1129581-45-1.jpg?t=%E9%92%9F%E9%9D%A2%E4%B8%8A%E6%9C%891%7E12%E4%B8%AA%E6%95%B0%E5%AD%97%2C%E4%BD%A0%C2%B7%C2%B7%C2%B7%C2%B71%2B%28-2%29%2B3%2B%28-4%29%2B5%2B%28-6%29%2B%28-7%29%2B8%2B%28-9%29%2B10%2B%28-11%29%2B12%3D0+%3B+1%2B2%2B3%2B4%2B5%2B%28-6%29%2B7%2B8%2B9%2B%28-10%29%2B%28-11%29%2B%28-12%29%3D0.%E6%9C%89%E4%BB%80%E4%B9%88%E8%A7%84%E5%BE%8B%3F)
钟面上有1~12个数字,你····1+(-2)+3+(-4)+5+(-6)+(-7)+8+(-9)+10+(-11)+12=0 ; 1+2+3+4+5+(-6)+7+8+9+(-10)+(-11)+(-12)=0.有什么规律?
钟面上有1~12个数字,你····
1+(-2)+3+(-4)+5+(-6)+(-7)+8+(-9)+10+(-11)+12=0 ; 1+2+3+4+5+(-6)+7+8+9+(-10)+(-11)+(-12)=0.有什么规律?
钟面上有1~12个数字,你····1+(-2)+3+(-4)+5+(-6)+(-7)+8+(-9)+10+(-11)+12=0 ; 1+2+3+4+5+(-6)+7+8+9+(-10)+(-11)+(-12)=0.有什么规律?
先说1+(-2)+3+(-4)+5+(-6)+(-7)+8+(-9)+10+(-11)+12=0
1+(-2)=3+(-4)=5+(-6)=-1 -》 1+(-2)+3+(-4)+5+(-6)=-3
(-7)+8=(-9)+10=(-11)+12=1 ) -》 (-7)+8+(-9)+10+(-11)+12=3
(-1 )+(-1 )+(-1 )+1+1+1=-3+3=0
再说第2个,
(1+9)+(2+8)+(3+7)+4+5+(-6)+(-10)+(-11)+(-12)=
(1+9)+(2+8)+(3+7)+(1+1+2)+5+(-6)+(-10)+(-11)+(-12)=
(1+9)+(2+8)+(3+7)+(5+1)+(-6)+(-10)+(1-11)+(2-12)=
10+10+10+0-10-10-10=0
1+(-2)=-1 3+(-4)=-1
没规律啊!第2个式子只是负的数字少些而已.要规律么!(就是答案都是0呗!)