When does 2 + 2 NOT equal 4???

Question

I know the answer. And no, it is not binary language. I will post the answer in one day that my teacher gave. Also, give me an example. Cause I got confused.

Well, the answer I was looking for lies in Chemistry. If you add 2 cups of water and 2 cups of salt, it doesn't make 4 cups of water. This is because the salt dissolves. Happycamper was the closest.

Answer 1

when you add 2mL of water to 2mL of sand, it make 4 mL. but if you add 2mL of water to 2 mL of gravel, it makes more than 4 mL. i know someone who did a science project on this subject.

Answer 2

4

Answer 3

In abstract algebra, the idea of binary operations leave the usual definition. A ring is a set of numbers that has operations + and x. However, the + and x does not have to be the standard one.

So 2 + 2 is not equal 4 if the definition of plus is changed. For example, in max-plus algebra, the plus is the maximum of the 2 numbers. So 1 + 3 would be 3 and so 2 + 2 = 2.

Answer 4

2+2 does not equal 4 for particularly large values of 2.

Or, more seriously, when you're working with modular arithmetic. For example:

(2+2) (mod 3) = 1, because in a mod 3 system, when you get to 3, you cycle back to the beginning again. Another way of looking at it is that in a mod 3 system, you must first complete the operation preceding (mod 3), then divide the result by 3. The remainder is your answer, which is why (2+2) (mod 3) = 1. Make sense?

Answer 5

When it is 2 - 2 .

Answer 6

I just want to clarify one thing.... u r right about mixing 2 substances and getting lower volume. but this is only a property of chemistry and does not dispute the 2+2=4's truthness. 2+2=4 is always true under the decimal system and rules of numbers and arithmetics we are most familiar with. When u count u use integers and +... this is actually a fitting of a real life process, counting, to a logical mathematical object of integers and + operation. and the chemistry example gives an instance where sometimes the fitting of real life and mathematical model is not perfect. From first inspection, we tot we can "count" volume... and with careful observation, we find we cannot. And so, we realise, we cannot simply fit real numbers and + operation directly to volume.

Answer 7

In many situations. It all depends on the axioms and definitions that you assume. 2+2=0 in Z mod 4. This is a group that satisfies the group axioms.

If you assume a base 4 number system, then 2+2=10. If you assume a base 3 number system, then 2+2=11.

You could also say that 2 drops of water plus 2 drops of water makes one drop of water.

Answer 8

the only time 2+2 not = to 4 is when you have a (-2) +(2)

Answer 9

okay, 2=2 will not give u 4 when each 2 is in different place values. This is because even in a place value table they only write (let's say) a 2 under the tens place so it is a 20. Therefore, there are many possibilities like 22, 2002, 220, 20020...etc.

Answer 10

When you are doing arithmetic in the cyclic group of order 3 aka the integers mod 3. Then 2+2 = 1.

Answer 11

Did you see "The Three Burials of Melquiades Estrada"? (Los Tres Tierramientos de Melquiades Estrada) The character that Tommy Lee Jones plays is a guy who never puts 2 and 2 together without exactly getting 4.

Actually, what I'm trying to say is he never is able to put 2 and 2 together to get 4. He always gets some other number, some other result, but never 4. Enough of that ****.