a) (37-17).(-5)+23.(-13-17); b)(-57).(67-34)-67.(34-57).

Bạn tham khảo nhé

a) (37 – 17) x (-5) + 23 x (-13 – 17)

= 20 x (-5) + 23 x -30

= -100 + -690

= -790

b) (-57) x (67 – 34) – 67 x (34 – 57)

= (-57) x 33 – 67 x (-23)

= -1881 – (-1541)

= -340