Texas Math Models

Try “number line” or “4.5D”

Write in the missing sides

12 + 7 + 12 + 7 = 38 units G3

a rectangle labeled twice is really labeled four times6767127127the amber sides were never printed: opposite sides match, so write them in first

How this one works

How

a rectangle only prints two sides. Write in the other two first.

Best when

always, before you add.

seen one of these on a test? See it on a real question: TEKS 3.7B, perimeter, and a missing side, or TEKS 4.5D, perimeter and area of rectangles.

The same problem, other ways