Math Midterm Review Kirby

Front

What is the absolute value of a number?

Back

The absolute value of a number is its distance from zero on the number line, regardless of direction. For example, the absolute value of -9 is 9.

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How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and then multiply by 100. For example, to convert 3/8 to a percentage: (3 ÷ 8) × 100 = 37.5%.

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Back

Front

How do you multiply decimals?

Back

To multiply decimals, ignore the decimal points and multiply the numbers as if they were whole numbers. Then, count the total number of decimal places in both numbers and place the decimal point in the product accordingly.

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

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How do you find the percent of a shaded area in a shape?

Back

To find the percent of a shaded area, divide the area of the shaded part by the total area of the shape and multiply by 100.

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What is the formula for finding the area of a rectangle?

Back

The area of a rectangle is found using the formula: Area = length × width.

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What is the formula for finding the perimeter of a rectangle?

Back

The perimeter of a rectangle is found using the formula: Perimeter = 2 × (length + width).

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What is the difference between a prime number and a composite number?

Back

A prime number has exactly two distinct positive divisors: 1 and itself. A composite number has more than two positive divisors.

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What is the order of operations in mathematics?

Back

The order of operations is: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). This is often remembered by the acronym PEMDAS.