Question

2x2=4 because count your numbers

Answer 1

Step-by-step explanation:

Because * 2 stands for 1+1, while 4 stands for 1+1+1+1 * addition is associative * addition distributes ... We can prove 2x2=4 easily. ... We can imagine the piles and count the pennies.

Answer 2

Step-by-step explanation:

1

2+2=2+S(1)=S(2+1)

=S(2+S(0))

=S(S(2+0))=S(S(2))

=S(3)=4