Adding/Subtracting Integers

Front

What is an integer?

Back

An integer is a whole number that can be positive, negative, or zero.

Front

What does it mean to add integers?

Back

Adding integers involves combining their values. If both integers are positive, the result is positive. If both are negative, the result is negative. If one is positive and one is negative, subtract the smaller absolute value from the larger absolute value and take the sign of the integer with the larger absolute value.

Front

What does it mean to subtract integers?

Back

Subtracting integers is the same as adding the opposite. For example, to subtract a positive integer, add its negative counterpart.

Front

What is the sum of -6 and -3?

Back

-6 + (-3) = -9.

Front

What is the sum of 9 and -22?

Back

9 + (-22) = -13.

Front

If Bob lost 5 points and then lost 9 points, what is the total loss?

Back

-5 + (-9) = -14.

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 happens when you add two negative integers?

Back

The result is always a negative integer.

Front

If the temperature drops from 10 degrees to 24 degrees below zero, what is the new temperature?

Back

10 - 24 = -14 degrees.

Front

Emily descended to 40 feet below sea level and then swam up 10 feet. How deep is she now?

Back

-40 + 10 = -30 feet. Then she descended another 4 feet: -30 - 4 = -34 feet.