Unit 4 Part 2 Add and Subtract Rational Numbers Review

Front

What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

Front

How do you add two rational numbers with the same sign?

Back

When adding two rational numbers with the same sign, you add their absolute values and keep the common sign.

Front

How do you add two rational numbers with different signs?

Back

When adding two rational numbers with different signs, you subtract the smaller absolute value from the larger absolute value and take the sign of the number with the larger absolute value.

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. It is always a non-negative value.

Front

Calculate: -40 + 15.05

Back

-24.95

Front

Calculate: -6.23 + 7.5

Back

1.27

Front

What is the first step in solving an addition problem with rational numbers?

Back

Identify the signs of the numbers being added.

Front

What does it mean to subtract rational numbers?

Back

Subtracting rational numbers means adding the opposite of the number being subtracted.

Front

If Jim biked 2 1/4 miles on Monday and 3 5/8 miles on Tuesday, how do you find the difference?

Back

Convert both mixed numbers to improper fractions, find a common denominator, and then subtract.

Front

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

Back

The result depends on the absolute values of the numbers; if the positive number's absolute value is greater, the result is positive, and vice versa.