1.(-1)+(+2)+(-3)+(+4)+……+(-99)+(+100)===2.一位农民经纪人10出售袋大豆给粮油批发市场,按规定每袋应为100千克.在过磅时,误差记录如下(单元:千克):-4,+3,+1,0,0,2,1,-1,0,-1.请你用简便方法帮这
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![1.(-1)+(+2)+(-3)+(+4)+……+(-99)+(+100)===2.一位农民经纪人10出售袋大豆给粮油批发市场,按规定每袋应为100千克.在过磅时,误差记录如下(单元:千克):-4,+3,+1,0,0,2,1,-1,0,-1.请你用简便方法帮这](/uploads/image/z/3974622-6-2.jpg?t=1.%28-1%29%2B%28%2B2%29%2B%28-3%29%2B%28%2B4%29%2B%E2%80%A6%E2%80%A6%2B%28-99%EF%BC%89%2B%EF%BC%88%2B100%EF%BC%89%3D%3D%3D2.%E4%B8%80%E4%BD%8D%E5%86%9C%E6%B0%91%E7%BB%8F%E7%BA%AA%E4%BA%BA10%E5%87%BA%E5%94%AE%E8%A2%8B%E5%A4%A7%E8%B1%86%E7%BB%99%E7%B2%AE%E6%B2%B9%E6%89%B9%E5%8F%91%E5%B8%82%E5%9C%BA%2C%E6%8C%89%E8%A7%84%E5%AE%9A%E6%AF%8F%E8%A2%8B%E5%BA%94%E4%B8%BA100%E5%8D%83%E5%85%8B.%E5%9C%A8%E8%BF%87%E7%A3%85%E6%97%B6%2C%E8%AF%AF%E5%B7%AE%E8%AE%B0%E5%BD%95%E5%A6%82%E4%B8%8B%EF%BC%88%E5%8D%95%E5%85%83%EF%BC%9A%E5%8D%83%E5%85%8B%EF%BC%89%EF%BC%9A-4%2C%2B3%2C%2B1%2C0%2C0%2C2%2C1%2C-1%2C0%2C-1.%E8%AF%B7%E4%BD%A0%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E5%B8%AE%E8%BF%99)
1.(-1)+(+2)+(-3)+(+4)+……+(-99)+(+100)===2.一位农民经纪人10出售袋大豆给粮油批发市场,按规定每袋应为100千克.在过磅时,误差记录如下(单元:千克):-4,+3,+1,0,0,2,1,-1,0,-1.请你用简便方法帮这
1.(-1)+(+2)+(-3)+(+4)+……+(-99)+(+100)
=
=
=
2.一位农民经纪人10出售袋大豆给粮油批发市场,按规定每袋应为100千克.在过磅时,误差记录如下(单元:千克):-4,+3,+1,0,0,2,1,-1,0,-1.请你用简便方法帮这位经纪人计算一下共出售了多少千克大豆?
3.电子跳蚤落在数轴上的某点,第一步从K0向左跳1个单位到K1,第二步从K1向右跳2个单位到K2,第三步从K2向左跳3个单位到K3,第四步由K3向右跳4个单位到K4…,按以上规律跳了100步时,电子跳蚤落在数轴上的点K100,且所表示的数恰好是19.94,试求电子跳蚤的初始位置K0所表示的数.
1.(-1)+(+2)+(-3)+(+4)+……+(-99)+(+100)===2.一位农民经纪人10出售袋大豆给粮油批发市场,按规定每袋应为100千克.在过磅时,误差记录如下(单元:千克):-4,+3,+1,0,0,2,1,-1,0,-1.请你用简便方法帮这
1)..(-1)+(+2+(-3)+(+4)+……+(-99)+(+100)
=(-1+2)+...+(-99+1000
=1*50
=50
2.100*10-4+3+1+2+1-1-1=1001kg
3.19.94-100+99-98+...+3-2+1=-30.06