120+56:2=148
120:2+4=64
100-50:2=75
k nha
120 + 56 : 2
= 120 + 28
= 148
120 : 2 + 4
= 60 + 4
= 64
100 - 50 : 2
=100 - 25
= 75
cho 1 k nha bn
120 + 56 : 2
= 120 + 28
= 148
120 : 2 + 4
= 60 + 4
= 64
100 - 50 : 2
= 100 - 25
= 75
120 + 56 : 2 = 148
120 : 2 + 4 = 64
100 - 50 : 2 = 75