l.=[(-25)+(-75)]+(34+66)
=-100+100
=0
m,=568-{5[143-9]+10}:10
=563-{5*134+10}:10
=563-{670+10}:10
=563-680:10
=563-68=495
n,=107-{38+[7*9-4+2^3]}:15
=107-{38+[63-4+8]}:15
=107-{38+67}:15
=107-105:15
=107-7
=100
l) (-25)+34+(-75)+66
= [(-25)+(-75)]+34+66
= (-100)+100)
= 0
m) 568-{5[143-(4-1)^2]+10}:10
= 568-{5[143-9]+10}:10
= 568-{5.134+10}:10
= 568-680:10
= 568-68
= 500
n) 107-{38+[7.3^2-24:6+(9-7)^3]}:15
= 107-{38+[7.9-24:6+8]}:15
= 107-{38+67}:15
= 107-105:15
= 107-7
= 100
*Chúc bạn học tốt nha :Đ*