One Monday in December, it was -8ºC in Harbin, China and −2ºC in Beijing, China. On the same day, it was about 7 degrees warmer in Shanghai than it was in Beijing.

How many degrees warmer was it in Shanghai than in Harbin?

Based on the temperature in the various cities, we can calculate that it was 13° C warmer in Shanghai than in Harbin.

Temperature in Shanghai was:

= Temperature in Beijing + Difference in temperatures

= -2 + 7

= 5°C

Temperature difference between Shanghai and Harbin is therefore:

= 5 - (-8)

= 5 + 8

= 13°C

In conclusion, it was 13°C warmer.

Find out more about temperature differences at

last one.

step-by-step explanation:

last one.

generally speaking, the others follow some sort of pattern that correlates to either linear (looks like a straight line) or sinusoidal (looks like an s).

the last one is just a random cloud of points that doesn't correlate to any particular known order.