7th Grade Math Semester 1 Review

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 -6 is 6, and the absolute value of 6 is also 6.

Front

Which of the following is not an integer: -5, 12, 0, -1/2?

Back

-1/2 is not an integer because integers are whole numbers that can be positive, negative, or zero.

Front

What is the constant of proportionality (k) in the equation k = y/x?

Back

The constant of proportionality is the ratio of y to x in a proportional relationship. For example, if Babbity Rabbity eats 15 carrots in 5 minutes, k = 15/5 = 3.

Front

How do you represent a location below sea level using integers?

Back

Locations below sea level are represented by negative integers. For example, if a submarine is 180 ft below sea level and dives another 150 ft deeper, its location is -330 ft.

Front

What is the result of the expression 3(2x+1)+2(x-4)?

Back

The result of the expression is 8x - 5.

Front

What is an integer?

Back

An integer is a whole number that can be positive, negative, or zero, but does not include fractions or decimals.

Front

What does it mean for two numbers to be equal?

Back

Two numbers are equal if they represent the same value or quantity. For example, -6 and 6 have the same absolute value, which is 6.

Front

How do you calculate the absolute value of a negative number?

Back

To calculate the absolute value of a negative number, remove the negative sign. For example, the absolute value of -6 is 6.

Front

What is the formula for finding the constant of proportionality?

Back

The formula for finding the constant of proportionality is k = y/x, where y is the output and x is the input.

Front

What is the significance of negative integers in real-world contexts?

Back

Negative integers are used to represent values below a reference point, such as temperatures below zero or depths below sea level.