A letter or symbol in an equation that is unknown.
400
At 9 am the outside temperature was -3 degrees. By noon, it was -12 degrees. The newscaster said that it was getting warmer outside. Why is this incorrect?
-3 is larger that -12 so it is getting colder outside.
400
16 - 18 =
-2
400
- 6 x - 8
48
400
-5 f = 60
f =-12
400
Inverse Operation, give example
The opposite operation, such as addition=subtraction.
500
For one day, Jenny recorded the low temperatures in five US cities. The temperatures were 5 degrees, -1 degrees, -3 degrees, 2 degrees and 0 degrees. Put these in order from smallest to largest.