The whole numbers that are between 7 and 13 are: 8, 9, 10, 11 and, 12.
The difference between 13 and 7 is 6.
Half the difference is 3. 6 divided by 2=3
The number 10 is halfway between 7 and 13.
To find this out you can either add half the difference to the smaller number or subtract half the difference from the larger number.
The second way is to use a number line.
The third way is to add both of the numbers together and divide the sum by two. 13+7=20 20 divided by 2=10
1.) a. What are the whole numbers between 68 and 72? They are 69, 70, 71.
b. What are the whole numbers between 108.3 and 111.6? They are 109, 110, 111.
2.) a. What is the halfway point between 70 and 170? It is 120.
b. What is the halfway point between 1801 and 1813? It is 1807.
c. What is the halfway point between 18.4 and 6.2? It is 12.3
Here is a link that could help you: http://wiki.answers.com/Q/How_do_you_find_the_number_that_lies_half_way_between_two_numbers
Sorry, I couldn't get the video to work so here is the link to get to the video. This video can help you if you have trouble dividing the difference. http://www.youtube.com/user/yourteachermathhelp#p/search/2/dcOOYtiGQJk
REMEMBER TO DO YOUR HOMEWORK!!!!!