Andrew wants to place grouping symbols in the expression 15 + 25 – 18 ÷ 2 so that it has a value of 18.5. Which shows the correct placing of the grouping symbols?
A.(15 + 25) – 18 ÷ 2
B.15 + (25 – 18 ÷ 2)
C.15 + (25 – 18) ÷ 2
D.15 + 25 – (18 ÷ 2)

Question

Andrew wants to place grouping symbols in the expression 15 + 25 – 18 ÷ 2 so that it has a value of 18.5. Which shows the correct placing of the grouping symbols? 
       A.(15 + 25) – 18 ÷ 2
       B.15 + (25 – 18 ÷ 2)
       C.15 + (25 – 18) ÷ 2
       D.15 + 25 – (18 ÷ 2)

skullpatrol · Answer

Any ideas?

skullpatrol · Answer

First simplify expressions within grouping symbols.

skullpatrol · Answer

1. First simplify expressions within grouping symbols.

2. Then simplify powers. 

3. Then simplify products and quotients
in order from left to right.

4. Then simplify sums and differences
in order from left to right.