Question

One day in January, the high temperature was −3.6∘ and the low temperature was −22.3∘ .

What was the difference between the high and low temperatures that day?



Enter your answer, as a decimal,

Answer 1

The difference is 18.7 degrees

Answer 2

18.7∘

Explanation:

The difference between the high and low temperatures that day is the gap between the recorded figures on the number line.

The difference can be derived from;

Let the difference be d

d = −3.6∘ - −22.3∘

In algebra, - × - = +

Therefore,

d = −3.6∘ - −22.3∘ = −3.6∘ + 22.3∘

d = 18.7∘

The difference between the high and low temperatures that day is 18.7∘.