Answer:
4
Step-by-step explanation:
Hello!
We can use simple addition for this one (:.
2 + 2 = 4.
If you want something more to prove a concept here's something I found on qoura:
To give an explanation of the basic addition problem of “2 + 2=4,” suppose we have a person standing on the real number line at the origin or the point corresponding to the integer zero (0). (We know from our study of Algebra that there is a one-to-one correspondence between the set of real numbers and the infinite number of points on a horizontal straight line) Now that the person is standing at zero, the rules are that any movement by the individual to the right is in the positive (+) direction, and that any movement to the left is in the negative (‒) direction.
1.) Let's say that the individual moves from zero to the right 2 units to the point or to the position on the real number line that corresponds to and is labeled positive 2; therefore, we see that positive 2 has an absolute value of 2.
Remember: the absolute value of any real number is its distance from zero (0) on the real number line regardless of direction. For example, │1│= 1, │2│=2, │1/4│= 1/4, │0│= 0, │‒5│= 5, │‒π│= π, and │‒3/2│= 3/2.
2.) Next, the individual decides to move to the right 2 additional units, an increase in absolute value of 2, from the position of positive 2 to the point or position on the real number line that corresponds to and is labeled positive 4; therefore, the total distance of the individual from zero is now 4 units to the right (an absolute value of 4); therefore, in summary, we have:
2 + 2 =│2│+│2│=│2 + 2│=│4│= 4 Since for any two positive real numbers a and b,│a│+│b│=│a + b│= a + b.
So, in conclusion, the addition of two positive integers, in this case the addition of positive 2 to itself (as shown above), is simply the adding together of their absolute values in order to arrive at the resultant sum or total, which in this case is 4.
