Answer:
12
Step-by-step explanation:
line the numbers up and cross off the first and last until you get to the middle. 11 and 13 were in the middle. 12 is between those numbers.
Answer:
12
Step-by-step explanation:
1). Order the numbers from least to greatest
2). Elliminate one number from each side until you reach the middle
3). Since there are 2 numbers in the middle, we add the up (11+13) and divide them by 2
