Question

(5*5-7):9+7*8-81:9=?

Answer 1

(5*5-7):9+7*8-81:9=49

Answer 2

To solve the expression (55-7):9+78-81:9, we need to follow the order of operations, also known as the PEMDAS rule (Parentheses, Exponents, Multiplication and Division from left to right, and Addition and Subtraction from left to right).

Let's break down the expression step by step:

Step 1: Calculate the multiplication and division from left to right. (55-7):9+78-81:9 = (25-7):9 + 78 - 81:9 = 18:9 + 78 - 81:9 = 2 + 56 - 9

Step 2: Perform the addition and subtraction from left to right. 2 + 56 - 9 = 58 - 9 = 49

Therefore, the result of the expression (55-7):9+78-81:9 is 49.