Explain why One third plus one third is not equal to two sixths?

Answer 1

because 2/6=1/3

imagine you had a Pizza and you cut it in half

total area = 1/2 + 1/2

if 1/3 + 1/3 = 2/6

then 1/2 +1/2 would equal 2/4

so half a pizza would have disappeared

i hope this helps