1. 5+8÷4-3= A - B - 10 C - 8 D - 4
2. 2÷2+2×2-2= A - 5 B - -1 C - 3 D - 9
3. 12÷6÷3÷2= A - 0 B - C - 9 D - 2
4. A - 8 B - 24 C - 18 D - 2