Question

1. add: (-12.8) + (-10.2)

Explanation:

Step1: Recall rule for adding negatives

When adding two negative numbers, we add their absolute values and keep the negative sign. So, $(-a)+(-b)=-(a + b)$ where $a = 12.8$ and $b = 10.2$.

Step2: Add the absolute values

Calculate the sum of the absolute values: $12.8+10.2 = 23$.

Step3: Apply the negative sign

Since both numbers are negative, the result is the negative of the sum of their absolute values. So, $(-12.8)+(-10.2)=-(12.8 + 10.2)=-23$.

Answer:

-23