Question

Tiffany made an error solving the following problem:

12:2+62-2-4= What mistake did Tiffany
make? What should she
12:2+36•2-4= have done instead?

Answer 1

Tiffany made an error in following the order of operations in the given expression. She should have performed multiplication before addition and subtraction according to the PEMDAS rule. PEMDAS stands for P- Parentheses, E- Exponents, M- Multiplication, D- Division, A- Addition, and S- Subtraction.

Step-by-step explanation:

Tiffany made an error in solving the problem: 12:2+62-2-4=

Tiffany did not follow the correct order of operations, which is commonly known as PEMDAS. According to PEMDAS, multiplication and division should be done before addition and subtraction. In this case, the correct answer can be found by following the order of operations.

Tiffany should have solved the problem as follows: 12:2+36×2-4=

This expression simplifies to 6+36×2-4=6+72-4= 74.