Question

compute.
7.24 - 12.863 =
7.28 + (-3.65) =

Explanation:

First Sub - Question: \(7.24 - 12.863\)

Step 1: Align the decimal points

We can rewrite \(7.24\) as \(7.240\) to have the same number of decimal places as \(12.863\). So the subtraction becomes \(7.240-12.863\).

Step 2: Perform the subtraction

Since \(7.240<12.863\), we can think of it as \(-(12.863 - 7.240)\). First, calculate \(12.863-7.240 = 5.623\). Then, apply the negative sign, so \(7.24 - 12.863=- 5.623\).

Second Sub - Question: \(7.28+(-3.65)\)

Step 1: Understand the operation

Adding a negative number is the same as subtracting the positive of that number. So \(7.28+(-3.65)=7.28 - 3.65\).

Step 2: Perform the subtraction

Subtract the two numbers: \(7.28-3.65 = 3.63\).

Answer:

\(7.24 - 12.863=\boldsymbol{-5.623}\)
\(7.28+(-3.65)=\boldsymbol{3.63}\)