Asquare on a large calendar has an area of 4220 square millimeters between which 2 integers is the length of 1 side of the square

10

step-by-step explanation:

7+3=10

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.