What is the difference in temperature between Edmonton, Alberta (−23 ∘C) and Phoenix, Arizona (+34 ∘C)

To find the difference in temperature between Edmonton, Alberta (-23 °C) and Phoenix, Arizona (+34 °C), you need to subtract the lower temperature from the higher one.

Here are the steps:

1. Identify the higher temperature: +34 °C (Phoenix, Arizona)
2. Identify the lower temperature: -23 °C (Edmonton, Alberta)
3. Subtract the lower temperature from the higher one: 34 - (-23)

Remember that subtracting a negative number is the same as adding its absolute value. So, 34 - (-23) is the same as 34 + 23.

4. Perform the addition: 34 + 23 = 57

So, the difference in temperature between Edmonton, Alberta and Phoenix, Arizona is 57 °C.