Identify the expression which represents the calculation "add 8 and 7, then multiply by 2."
A) (2 x 8) + 7
B) 8 + (7 x 2)
C) 2 + (8 x 7)
D) 2 x (8 + 7)
so, which choice does the addition first? Think PEMDAS
8+(7x2)
Actually, the problem says "add 8 and 7, then multiply by 2", so we should add 8 and 7 first, and only then multiply by 2. So the correct expression is:
(8 + 7) x 2
which simplifies to:
15 x 2
and the final answer is:
30
To solve this calculation, we need to follow the given sequence of operations: add 8 and 7, then multiply the sum by 2.
The expression that represents this calculation is option D) 2 x (8 + 7).
This expression means that we have to first add 8 and 7 inside the parentheses, which gives us 15. Then, we multiply this sum by 2. So, the final calculation is 2 x 15.