Question #4543d

Jun 26, 2016

The current temperature is -5 degrees Celsius.

Explanation:

Method 1)
A more visual way to help one's understanding.
5 degrees Celsius minus 10 equals to -5. Here is the visual representation. Look at the number line below and count all the lines down from 5 (excluding the number itself) this leads up to -5. You will see that you have counted 10 lines (5 to 0, then 0 to -5 this means you counted 10 lines) - which proves 5 - 10 equals -5. Method 2)
A much easier way.
5 - 10 = -5

Jun 28, 2016

Another way of looking at it.

$- 5$

Explanation:

If the temperature dropped then the final temperature is less than we started so we need to reduce the $\textcolor{b l u e}{5}$ by $\textcolor{b r o w n}{10}$

so we have $\textcolor{b l u e}{5} \textcolor{b r o w n}{- 10}$

Split the $\textcolor{b r o w n}{- 10} \text{ into } \textcolor{b r o w n}{- 5 - 5}$

So$\text{ "color(blue)(5)color(brown)(-5-5)" " =" } 0 \textcolor{b r o w n}{- 5}$

So$\text{ } 5 - 10 = - 5$