1 2*3=6
2 4*7=28
3 28÷2 =14
4 5*6=30
5 6+14=20
6 20+11 =31
7 31-4 = 27
8 27+30=57
9 57 - 3 =54
2×3=6
4×7=28
28:2=14
5×6=30
6+14=20
20+11=31
31-4=27
27+30=57
57-3=54
2×3+4×7÷2+11-4+5×6-3=54
