add and subtract 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 means adding the opposite. For example, to subtract a negative integer, you add its positive counterpart.

Front

What is the sum of (-10) + (-7)?

Back

-17

Front

If Jimmy spent $45 eating out, gained $55 mowing lawns, and spent $15 on gas, what is his change in dollars?

Back

-$5

Front

How do you find the difference between two temperatures, such as -20 degrees and 85 degrees?

Back

To find the difference, subtract the lower temperature from the higher temperature: 85 - (-20) = 105.

Front

What is the final change in yardage if a football team gained 8 yards, lost 6 yards, gained 3 yards, and lost 12 yards?

Back

-7 yards.

Front

If the temperature drops from 32 degrees Fahrenheit by 11 degrees, what is the new temperature?

Back

21 degrees Fahrenheit.

Front

What is the rule for adding two negative integers?

Back

When adding two negative integers, the result is negative and you add their absolute values.

Front

What is the rule for adding a positive integer and a negative integer?

Back

When adding a positive integer and a negative integer, subtract the smaller absolute value from the larger absolute value and take the sign of the integer with the larger absolute value.