the temperature on Monday is 30°c.The following table shows the changes of temperature compared to Monday.
Tuesday Rise 2°c compared to Monday
Wednesday Drop 3°c compared to Monday
Thursday Drop 1°c compared to Monday
Supposed that +1°c means that the temperature rises 1°c .
(a)Use directed number to represent the changes on Tuesday and Wednesday compared to Monday.
(b) Find the temperature on Thursday.