Order of operations in a real bill flashcards

What does PEMDAS stand for?

PEMDAS means: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.

Calculate: 3 + 5 × 2

5 × 2 = 10, then 3 + 10 = 13.

True or false: 8 + 2 × 4 = 40.

False, because multiplication comes before addition.

Difference between Addition and Multiplication?

Addition combines numbers, while multiplication increases numbers by repeated addition.

Fill in the blank: 6 + (2 × 3) = ___

6 + (2 × 3) = 6 + 6 = 12.

What is the first step in 2 + 3 × 4?

The first step is to do the multiplication: 3 × 4 = 12.

Calculate: (8 - 3) × 2 + 1

First, 8 - 3 = 5, then 5 × 2 + 1 = 10 + 1 = 11.

True or false: (10 - 2) + 3 × 3 = 14.

True, because it calculates as (8) + 9 = 17.

Calculate: 7 + 3² - 5

3² = 9, then 7 + 9 - 5 = 11.

What is an exponent?

An exponent shows how many times to multiply a number by itself, like $\displaystyle 2^3 = 2 × 2 × 2$.

Calculate: 10 - 5 + 2

Start from left: 10 - 5 = 5, then 5 + 2 = 7.

Calculate: 4 × (3 + 2) - 6

3 + 2 = 5, then 4 × 5 - 6 = 20 - 6 = 14.

Fill in the blank: 5 × 2 + 6 = ___

5 × 2 = 10, then 10 + 6 = 16.

Which comes first: 6 × 2 + 4?

Do the multiplication first: 6 × 2 = 12, then add 4: 12 + 4 = 16.

True or false: 9 - (3 + 2) = 4.

False, because 9 - 5 = 4.

What is 2 raised to the power of 4?

$\displaystyle 2^4 = 2 × 2 × 2 × 2 = 16$.

Calculate: (5 + 3) × 2 - 4

5 + 3 = 8, then 8 × 2 - 4 = 16 - 4 = 12.

Difference between Division and Subtraction?

Division splits numbers into equal parts, while subtraction takes away.