3rd 6 Weeks Flashcard 3.3

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed. The acronym PEMDAS is often used: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

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-7

Front

If 2 red pens represent 25% of the total number of pens, how do you find the total number of pens?

Back

To find the total number of pens, divide the number of red pens by the percentage (in decimal form): Total = 2 / 0.25 = 8 pens.

Front

What percent of 60 books is 24 books?

Back

To find the percentage, use the formula: (Part/Whole) x 100. So, (24/60) x 100 = 40%.

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How do you calculate hourly wage from total earnings and hours worked?

Back

To calculate hourly wage, divide total earnings by the number of hours worked. For example, if Noelia earns $224 for 16 hours, her wage is $224 / 16 = $14 per hour.

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-5

Front

Define 'percent' in mathematical terms.

Back

Percent means 'per hundred' and is a way to express a number as a fraction of 100.

Front

What is the formula to find the average of a set of numbers?

Back

The average is found by adding all the numbers together and then dividing by the count of numbers. Average = (Sum of values) / (Number of values).

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to reduce it to its simplest form, making it easier to understand or calculate.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and then multiply by 100. For example, 1/4 = (1 ÷ 4) x 100 = 25%.