40+5=45
80-80=0
70-40=30
30+30=60
70+30=100
40 + 5 = 45
80 - 80 =0
70 - 40 =30
30 + 30 =60
70 + 30 =100
Ai tk mk mk tk lại
40 + 5 = 45
80 - 80 = 0
70 - 40 = 30
30 + 30 = 60
70 + 30 = 100
40+5=45
80-80=0
70-40=30
30+30=60
70+30=100
40 + 5 = 45
80 - 80 = 0
70 - 40 = 30
30 + 30 = 60
70 + 30 = 100