Question

tính nhanh

(-43)+44 +(-45) +46 +....+(-97)+98+(-99)

Answer 1

\(\left(-43\right)+44+\left(-45\right)+46+...+\left(-97\right)+98+\left(-99\right)\)

\(=1+1+1+...+1+\left(-99\right)\)

\(=1.55+\left(-99\right)\)

\(=55+\left(-99\right)=-44\)

Answer 2

TRả lời :.....................

-44..............................

Hk tốt..............................