Thực hiện phép tính: a) (–25) – (–17) + 24 – 12. b) 4(15 – 18) – (3 – 5).3^2
Giải thích
a) (–25) – (–17) + 24 – 12 = (–25) + 17 + 24 – 12 = –8 + 24 – 12 = 16 – 12 = 4.
b) 4(15 – 18) – (3 – 5).32 = 4. (–3) + 2.32 = –12 + 18 = 6.
a) (–25) – (–17) + 24 – 12 = (–25) + 17 + 24 – 12 = –8 + 24 – 12 = 16 – 12 = 4.
b) 4(15 – 18) – (3 – 5).32 = 4. (–3) + 2.32 = –12 + 18 = 6.