Chike measures the change in temperate (in degrees Celsius) of a mixture during an experiment.
Complete the sentences to describe a situation that we can represent with the expression
\[-20 + (-50)\].
The mixture
warmed/cooled
by
\[20\] degrees.
Then the mixture
warm/cooled
by
\[50\] degrees.
The mixture cooled by 20 degrees.
Then the mixture cooled by 50 degrees.