Question

n the 1920s, sled dog teams delivered mail to remote cities like Nome in the winter. The lowest temperature most sled dogs can run in is -71ºF. That’s 21º warmer than the coldest it gets in Alaska in winter. What’s the winter low temperature in Alaska?

Answer 1

-50

Explanation:

-71 + 21

-50

The 21 is positive so we subtract it off like when we do 1 - 1. The second 1 is negative to the first 1 who is positive.

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