Bài 1: Thực hiện phép tính
a) (134 – 34).(-28) + 72.[(-55) – 45]
b) 4.25 – 12.5 + 170:10
c) 369 – (206 – 15) – (-206 + 369)
d) 345 – 150:[(33 – 24)2 – (-21)] +20160
e) 307 - [(180.40 - 160) : 22 + 9] : 2
f) 350.12.173 + 12.27
h, 2019 + (-247) + (-53) – 2019
g) 13.70 – 50.[(19-32) : 2 + 23]
h) 32 : 4 + [60 – (12 – 7)2]
i) 17.85 + 15.17 – 120