Question

add $3.8 + (-0.6)$
plot the first addend and the sum on the number.
(there is a number line with marks at 2, 3, 4, 5, 6 and a blue dot near 2 initially)

Explanation:

Step1: Understand the operation

We need to add \(3.8 + (-0.6)\). Adding a negative number is the same as subtracting its absolute value, so this becomes \(3.8 - 0.6\).

Step2: Perform the subtraction

\(3.8 - 0.6 = 3.2\). Now, we plot the first addend (\(3.8\)) and the sum (\(3.2\)) on the number line. The first addend \(3.8\) is between \(3\) and \(4\), closer to \(4\), and the sum \(3.2\) is between \(3\) and \(4\), closer to \(3\).

Answer:

The sum of \(3.8 + (-0.6)\) is \(3.2\). The first addend \(3.8\) and the sum \(3.2\) are plotted on the number line (with \(3.8\) at a position \(0.8\) units from \(3\) towards \(4\) and \(3.2\) at a position \(0.2\) units from \(3\) towards \(4\)).