(-1)+2+(-3)+(+4)+……+(-99)+100 2提(-3.125)+(-4.75)+4又+3/4+3又1/

这个觉晓2022-10-04 11:39:541条回答

(-1)+2+(-3)+(+4)+……+(-99)+100 2提(-3.125)+(-4.75)+4又+3/4+3又1/8
3提3.8+(-8.4) 4提2/5+(-3/5) 5提3又1/4+(-1又1/2)6提(-3又1/3)+(-4又1/2)+2又1/2+(-4又2/3)

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zxcv200222 共回答了11个问题 | 采纳率72.7%
(-1)+2+(-3)+(+4)+……+(-99)+100
=2-1+4-3+.+100-99
=1+1+.+1
=50
(-3.125)+(-4.75)+4又3/4+3又1/8
=(3.125-3.125)+(4.75-7.75)
=0+0
=0
3.8+(-8.4)
=3.8-8.4
=-4.6
2/5+(-3/5)
=2/5-3/5
=-1/5
3又1/4+(-1又1/2)
=3.25-1.5
=1.75
(-3又1/3)+(-4又1/2)+2又1/2+(-4又2/3)
=(-3又1/3-4又2/3)+(2.5-4.5)
=-8-2
=-10
1年前

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