Which statement best explains why the sum of the areas of the two white squares in fingered 2 is the same as the area of the white square in figure 1

If i think this is what your asking, he should look at the grams or pounds/ounces and compare the to their cost then max can identify which one is proportional and which is not ( i think xd)

The additive identity is 0 because when you add 0 to a number, you get the identical number as an answer.a + 0 = a