2 +7 -3× 5 ÷2 solve this questions in mathmtic
[(2 +7) -(3× 5] ÷2
(9 - 15) / 2
-6 / 2 = -3
Or should the parentheses and brackets be placed elsewhere?
Using PEMDAS, this parses to
2 +7 -3× 5 ÷2 (no parentheses, so do the multiplication/division next)
2 + 7 - 15÷2
2 + 7 - 7.5 - now do the add/subtract
9 - 7.5
1.5 or, 3/2
To solve this mathematical expression: 2 + 7 - 3 × 5 ÷ 2, we follow the order of operations, which is commonly known as PEMDAS (Parentheses, Exponents, Multiplication and Division - left to right, Addition and Subtraction - left to right).
1. First, we perform any calculations within parentheses, if there are any. In this expression, there are no parentheses.
2. Next, we evaluate any exponents or powers, if there are any. In this expression, there are no exponents.
3. Now, we move on to the multiplication and division from left to right. In this case, we have 3 × 5 and 5 ÷ 2. We solve them one by one:
3 × 5 = 15
5 ÷ 2 = 2.5
4. Finally, we perform addition and subtraction from left to right.
2 + 7 - 15 ÷ 2.5
= 2 + 7 - 6
= 9 - 6
= 3
Therefore, the solution to the mathematical expression 2 + 7 - 3 × 5 ÷ 2 is 3.