Fall Semester Semi-Review

Front

What is a ratio?

Back

A ratio is a relationship between two numbers indicating how many times the first number contains the second. For example, the ratio of 2 to 3 can be written as 2:3.

Front

How do you simplify a fraction using divisibility rules?

Back

To simplify a fraction, divide both the numerator and the denominator by their greatest common divisor (GCD). Use divisibility rules to check if a number can be divided evenly.

Front

What is the result of adding a positive number and a negative number?

Back

When you add a positive number to a negative number, you subtract the smaller absolute value from the larger absolute value and keep the sign of the larger number.

Front

How do you find the difference in temperature between two locations?

Back

To find the difference in temperature, subtract the lower temperature from the higher temperature. For example, if California is 85 degrees and Nebraska is -4 degrees, the difference is 85 - (-4) = 89 degrees.

Front

What percentage of questions did a student answer correctly if they got 21 out of 25 questions right?

Back

To find the percentage, divide the number of correct answers by the total number of questions and multiply by 100. (21/25) * 100 = 84%.

Front

What is the definition of divisibility?

Back

Divisibility is the ability of one number to be divided by another without leaving a remainder. For example, 10 is divisible by 5.

Front

What does it mean for a number to be even?

Back

An even number is any integer that can be divided by 2 without leaving a remainder. Examples include -4, 0, 2, and 8.

Front

What is the sum of two integers, one positive and one negative?

Back

The sum depends on the absolute values of the integers. If the positive integer is larger, the result is positive; if the negative integer is larger, the result is negative.

Front

How do you determine if a number is divisible by 3?

Back

A number is divisible by 3 if the sum of its digits is divisible by 3. For example, for 123, 1 + 2 + 3 = 6, which is divisible by 3.

Front

What is the formula to calculate the percentage of correct answers?

Back

Percentage = (Number of Correct Answers / Total Number of Questions) * 100.