Question

1. 12×(4 - 2) - 3×(1 + 4)

Explanation:

Step1: Calculate inside parentheses

First, solve the expressions inside the parentheses. For \(12\times(4 - 2)\), we have \(4 - 2 = 2\). For \(3\times(1 + 4)\), we have \(1 + 4 = 5\).
So now the expression becomes \(12\times2 - 3\times5\).

Step2: Perform multiplication

Next, perform the multiplication operations. \(12\times2 = 24\) and \(3\times5 = 15\).
Now the expression is \(24 - 15\).

Step3: Perform subtraction

Finally, subtract the two results. \(24 - 15 = 9\).

Answer:

\(9\)