You add a negative number to it.
5+-4= 1
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1, 3, 5... (just keep adding 2 at a time).1, 3, 5... (just keep adding 2 at a time).1, 3, 5... (just keep adding 2 at a time).1, 3, 5... (just keep adding 2 at a time).
Adding is when you add numbers to something and subtracting is when you take them away. When you add you do not always make the number go up for example 5 + (-7)= -2.
In order to get 10, you would have to split the 5 into 2 + 3:8 + 2 = 10 + 3 = 13
Well, isn't that a lovely little math question? To make a whole, you need to add 5 to 3. Just like adding a few happy little trees to a painting to make it complete, adding 5 to 3 will give you a nice, whole number. Remember, there are no mistakes in math, just happy little accidents!
5 and 3 are two prime numbers which on adding give 8.