Adding and 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, you add their absolute values. If both are negative, you add their absolute values and keep the negative sign. If one is positive and one is negative, subtract the smaller absolute value from the larger 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 negative integer, you add its positive counterpart.

Front

What is the result of -4 - (-2)?

Back

-4 - (-2) is the same as -4 + 2, which equals -2.

Front

How do you find the difference between two temperatures?

Back

To find the difference between two temperatures, subtract the lower temperature from the higher temperature, regardless of their signs.

Front

What is the greatest value among -7 + (-3), 11 - (-5), -9 + 5, and 12 - 6?

Back

The greatest value is 11 - (-5), which equals 16.

Front

What is the result of (-2) - (-3)?

Back

(-2) - (-3) equals 1.

Front

If Emily is at -40 feet and swims up 10 feet, what is her new depth?

Back

Her new depth is -30 feet (or 30 feet above sea level).

Front

If Emily then descends another 4 feet from -30 feet, what is her final depth?

Back

Her final depth is -34 feet.

Front

What is the rule for adding two negative integers?

Back

When adding two negative integers, add their absolute values and keep the negative sign.