Day 137: Revisit Order of Operations

Front

What is the Order of Operations?

Back

The Order of Operations is a set of rules that determines the sequence in which calculations are performed in a mathematical expression. The acronym PEMDAS helps remember the order: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

What does PEMDAS stand for?

Back

PEMDAS stands for Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

What is the first step in solving an expression using the Order of Operations?

Back

The first step is to solve any expressions inside parentheses.

Front

If you have the expression 3 + 5 × 2, what do you solve first?

Back

You solve the multiplication first: 5 × 2 = 10, then add 3 to get 13.

Front

What is the result of the expression 8 - 3 + 2?

Back

The result is 7. You solve from left to right: 8 - 3 = 5, then 5 + 2 = 7.

Front

In the expression 4 × (2 + 3), what do you calculate first?

Back

You calculate the expression inside the parentheses first: 2 + 3 = 5, then multiply by 4 to get 20.

Front

What is an exponent?

Back

An exponent is a number that shows how many times to use the base in a multiplication. For example, 2^3 means 2 × 2 × 2 = 8.

Front

What is the value of 2^4?

Back

The value of 2^4 is 16, because 2 × 2 × 2 × 2 = 16.

Front

How do you handle multiplication and division in the Order of Operations?

Back

You perform multiplication and division from left to right as they appear in the expression.

Front

How do you handle addition and subtraction in the Order of Operations?

Back

You perform addition and subtraction from left to right as they appear in the expression.