列式計算:100+95+90+.+15+10+5大神們幫幫忙
列式計算:100+95+90+.+15+10+5大神們幫幫忙
數(shù)學(xué)人氣:849 ℃時間:2020-06-03 18:08:41
優(yōu)質(zhì)解答
100+95+90+.+15+10+5 (100/5=20個數(shù)) =(100+5)+(95+10)+...+(55+50) (10個數(shù)) =105*10=1050
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