Question

tính

A=1+(-2)+(-3)+4+5+(-6)+(-7)+8+. . . .+99-100-101+102+103

nhanh lên nhé!

Answer 1

A = 1 + (-2) + (-3) + 4 + 5 + (-6) + (-7) + 8 + .......... + 99 - 100 - 101 + 102 + 103

A = 1 - 2 - 3 + 4 + 5 - 6 - 7 + 8 + ................ + 99 - 100 - 101 + 102 + 103

A = ( 1 - 2 - 3 + 4 ) + ( 5 - 6 - 7 + 8 ) + ............. + ( 99 - 100 - 101 + 102 ) + 103

A = 0 + 0 + ............. + 0 + 103

A = 0 + 103

A = 103