Toán Lớp 6: tính nhanh,hợp lí
-1+2+3-4-5+6+7-8- ……..+99-100-101
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Toán Lớp 6: tính nhanh,hợp lí
-1+2+3-4-5+6+7-8- ……..+99-100-101
Comments ( 2 )
Xin hay nhất vs vote 5 sao ????
=(−1+2+3−4)+(−5+6+7−8)+………………+(−97+98+99−100)−101
=0+0+…………………+0−101
=−101