Question

Evaluate the expression. $$ 1.3+(-1.3)-4.2 $$

Short answer

-4.2

Step-by-step solution

Add 1.3 and -1.3

When we add \(1.3\) and \(-1.3\), we obtain \(0\). This is because \(-1.3\) is the additive inverse of \(1.3\), so adding these two numbers together results in zero.

Subtract 4.2 from the Result

After obtaining \(0\) from step 1, we then subtract \(4.2\) from \(0\). Since subtracting a number is equivalent to adding its additive inverse, and the additive inverse of \(4.2\) is \(-4.2\), we add \(-4.2\) to \(0\) and get \(-4.2\).