Question

Choose 2 numbers whose sum is -2.6.
-3 1/2
0.7
-14/5
0.3
1.0
0.2
-2 9/10
0.8
-3 3/10
-3 2/5
-18/5
0.9

Answer 1

To find two numbers from the list whose sum is -2.6, we can convert -2.6 into a fraction for easier calculations:

\(-2.6 = -\frac{26}{10} = -\frac{13}{5}\).

Now, let's check pairs of numbers to find the match:

1. **-3.5** (which is \(-\frac{7}{2} = -\frac{15}{6}\)) and **0.7** (which is \(0.7 = \frac{7}{10}\)):
\(-3.5 + 0.7 = -3.5 + 0.7 = -2.8 \) (not a match)

2. **-3.5** and **-2.9** (try converting small fractions):
First, convert -2.9 to a fraction:
\(-2.9 = -\frac{29}{10} = -\frac{29}{10}\).

3. Check **-3.5** and **0.3**:
\(-3.5 + 0.3 = -3.2\) (not a match)

Following this approach with simpler checks:

After several tests along these calculations, we can find that pairs of numbers yield results cumulatively to the value required.

The search seems structured around products, so we can find pairs from the bottom of the sequence to see if -2.6 is summative as suggested direct pairs.

Upon testing, the validated pairs found to yield sums as negative or positive are:

1. **-3 1/2** (which is -3.5) + **0.9** = -2.6

So the two numbers from the provided list whose sum is -2.6 are:

- **-3 1/2**
- **0.9**