Tính nhanh: -2374 - 597 + 2597 + 1374 + 2018

Bai 1 : Thuc hien phep tinh ( hop ly neu co the )
a, -2374 - 597 + 2597 + 1374 + 2018
b, -47 . 43 + ( -47 ) . 56 + ( -47 )
c, 195 - ( 2 . 3^3 - 100 : 5^2 )
Bai 2 : Cho bieu thuc A = ( -a - b + c ) - ( -a - b - c ) - 2.b
a, Rut gon A                         b, Tinh gia tri cua A voi a = 2018, b = -1, c = -2
MONG CAC BAN GIUP!!!!!
CAN GAP. CAM ON !!!!!!