Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.
234 * 345 * 456 * 567 * 678 * 12
1
-, +, +, -, =
2
÷, -, +, -, =
3
+, ×, +, -, =
4
+, -, +, -, =
Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.
234 * 345 * 456 * 567 * 678 * 12