(1×0.35+2×0.35+……100×0.35)
答案:4 悬赏:70 手机版
解决时间 2021-11-30 22:23
- 提问者网友：轮囘Li巡影
- 2021-11-30 10:49
(1×0.35+2×0.35+……100×0.35)
最佳答案
- 五星知识达人网友：纵马山川剑自提
- 2021-11-30 11:24
1×0.35+2×0.35+……100×0.35
=（1+2+……+100）×0.35
=[（1+100）×100÷2]×0.35
=[101×100÷2]×0.35
=5050×0.35
=1767.5
=（1+2+……+100）×0.35
=[（1+100）×100÷2]×0.35
=[101×100÷2]×0.35
=5050×0.35
=1767.5
全部回答
- 1楼网友：夜余生
- 2021-11-30 13:55
(1×0.35+2×0.35+……100×0.35)
=0.35×（1+2+……+100）
=0.35×（1+100）×100÷2
=101×350÷2
=（100+1）×175
=100×175+1×175
=17500+175
=17675追答写错得数了第三步
=101×35÷2
=（100+1）×17.5
=100×17.5+1×17.5
=1750+17.5
=1767.5
=0.35×（1+2+……+100）
=0.35×（1+100）×100÷2
=101×350÷2
=（100+1）×175
=100×175+1×175
=17500+175
=17675追答写错得数了第三步
=101×35÷2
=（100+1）×17.5
=100×17.5+1×17.5
=1750+17.5
=1767.5
- 2楼网友：低音帝王
- 2021-11-30 13:23
原式=0.35x（1+2+……+100）
=0.35x（1+100）x100➗2
=0.35x1x50+0.35x100x50
=17.5+1750
=1767.5
=0.35x（1+100）x100➗2
=0.35x1x50+0.35x100x50
=17.5+1750
=1767.5
- 3楼网友：渡鹤影
- 2021-11-30 12:10
(1×0.35+2×0.35+……100×0.35)
=(1+100)x(100÷2)x0.35
=101x50x0.35
=5050x0.35
=1767.5
=(1+100)x(100÷2)x0.35
=101x50x0.35
=5050x0.35
=1767.5
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