(a) The temperature fell by 16 degrees Fahrenheit today.
Write a signed number to represent this temperature change.
(b) The temperature was 85 degrees above 0 (in Fahrenheit) today.
Write a signed number to represent this temperature.
(a) -16
(b) +85
(a) To represent a temperature change of 16 degrees Fahrenheit falling, we can use the signed number -16.
(b) To represent a temperature of 85 degrees Fahrenheit above 0, we can use the signed number +85.
(a) To represent the temperature change of 16 degrees Fahrenheit, we need to use a signed number. Since the temperature fell, we use a negative sign to indicate this decrease. So, the signed number to represent the temperature change is -16.
(b) To represent a temperature of 85 degrees Fahrenheit above 0, we don't need to use a signed number because this temperature is already positive. So, the signed number to represent this temperature is simply 85.