Adding and Subtracting Integers and Rational Numbers

Front

What is an integer?

Back

An integer is a whole number that can be positive, negative, or zero, but not a fraction or decimal.

Front

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

Back

The result 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

What is the rule for adding integers with the same sign?

Back

When adding integers with the same sign, add their absolute values and keep the sign.

Front

What is the rule for adding integers with different signs?

Back

When adding integers with different signs, subtract their absolute values and take the sign of the integer with the larger absolute value.

Front

What is the result of 4 + (-5)?

Back

-1

Front

What is the result of -5 + 4?

Back

-1

Front

How do you subtract integers?

Back

To subtract an integer, add its opposite. For example, a - b is the same as a + (-b).

Front

What is a rational number?

Back

A rational number is any number that can be expressed as a fraction a/b, where a and b are integers and b is not zero.

Front

What is the result of 38.2 - 2?

Back

36.2

Front

What is the result of -100 - 52?

Back

-152