If we count all the squares together we have squares.

Both and equal . So these two equations equal each other. , , and . Because none of these equations equal , they can’t be equal to .

Line up all numbers vertically. Add up the ones column first:

Carry the “10” in 15. Now add the tens place:

The sum is 135.

If we count all the squares together we have squares.

When adding any number by the only number that will change in your answer is the tens place.

When you add and together you get . does not equal because . does not equal because . does not equal because .

We have squares and triangles. and are the same number, so they are equal to each other.

Perimeter is the sum of all the sides. For a square,

Therefore, for this square,

Both and equal . So these two equations equal each other. , , and . Because none of these equations equal , they can’t be equal to .

If we count all the squares together we have squares.