Evaluate the sums and determine which statement is true column a 0.7 + 1.8 column b 1 + 0.25 statements only column a has a rational sum only column b has an irrational sum see both called a and b have rational sums

Let's evaluate the sums in both columns:

**Column A:**
\[ 0.7 + 1.8 \]

Performing the addition:

\[ 0.7 + 1.8 = 2.5 \]

**Column B:**
\[ 1 + 0.25 \]

Performing the addition:

\[ 1 + 0.25 = 1.25 \]

Now let's summarize the results:

- **Column A:** The sum is \( 2.5 \), which is a rational number.
- **Column B:** The sum is \( 1.25 \), which is also a rational number.

Now we can evaluate the statements:

1. **Only column A has a rational sum** - This statement is false since column B also has a rational sum.
2. **Only column B has an irrational sum** - This statement is false since both sums are rational.
3. **Both column A and B have rational sums** - This statement is true.

Thus, the correct statement is: **Both column A and B have rational sums.**