Final answer:
The expression 12 – 212+ 21 – 3+ 1 simplifies to -181.
Step-by-step explanation:
The expression 12 – 212+ 21 – 3+ 1 can be simplified by performing the operations in the correct order. First, add/subtract from left to right:
- 12 – 212 = -200
- -200 + 21 = -179
- -179 – 3 = -182
- -182 + 1 = -181
Therefore, the expression 12 – 212+ 21 – 3+ 1 is equivalent to -181.