Using the sum (addition) and two 2-digit addends, 12 + 34 can be answered without regrouping.
If that 25/4 is a fraction them the answer is 53/4. Or in simplest form 3 5/16 or 3.3125
1: m=-4
2: b=-4
3: -9=k
4: C=-11.4
5:X<10
Step-by-step explanation:

We have to simplify the given expression.

We know that:


Therefore, we get:




The answer to this question is -5