Question

Tính nhanh: (2+4+6+...+98+100)*(36*333-108*111)

Answer 1

(2 + 4 + 6 + ...+ 98 + 100) x (36 x 333 - 108 x 111)

= (2 + 4 + 6 + ...+ 98 + 100) x (36 x 3 x 111 - 108 x 111)

= (2 + 4 + 6 + ...+ 98 + 100) x ( 108 x 111 - 108 x 111)

= (2 + 4 + 6 + ...+ 98 + 100) x 0 = 0

Answer 2

19991999*1998-19981998*1999

Answer 3

tính nhanh 19991999*1998-19981998*1999