there are 36 ways to add up to
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To make the list of two-digit numbers with digits that add up to 10, first write the pairs of single-digit integers that add up to 10. They are (1,9), (2,8), (3,7), (4,6), (5,5). Then recognize that each of these pairs of numbers, except 5, can be combined in two different ways to make two-digit numbers that satisfy the problem. 19 and 91 28 and 82 37 and 73 46 and 64 55 So there are nine two-digit numbers with digits that add up to 10.
You add the two numbers and then divide it by two. It basically doing the mean which is adding all the numbers and dividing it by how many numbers there are. I hope this helped!
39!
You must add either two odd numbers or two even numbers.
5 different ways isn't it