Question

1+2+3+4+5+...+123+?=0

???

Answer 1

tôi chịu mấy cái này

Answer 2

1+2+3+4+5+...+123=123+122+...+2+1

=124+124+...+124+124(co 123 so hang)

=124x100:2=7626

vay 7626+?=0

?=am 7626

Answer 3

o doan 124x100:2 minh nham 100 phai la 123 con lai van dung

Answer 4

bang 7626 nha

Answer 5

ta có 1+2+3+4+5+...+123 = 7626

suy ra ? = 0 - 7626 = - 7626

Answer 6

TA CÓ:

1+2+3+..+123=7626

=> 7626+?=0

=> 7626+(-7626)

    =7626-7626

    =0