Let's simplify the expression step by step using the order of operations (PEMDAS/BODMAS):
The expression is:
\[ 3 \times 42 - 9 \times 2 \]
- Calculate the multiplications first:
- \( 3 \times 42 = 126 \)
- \( 9 \times 2 = 18 \)
Now we can rewrite the expression with these results: \[ 126 - 18 \]
- Now, perform the subtraction:
- \( 126 - 18 = 108 \)
Thus, the simplified expression is: \[ 108 \]