Turn it
7 × 12 = 84 square units G3
How this one works
How
turn the rectangle. The squares inside do not change, so the area does not either.
Best when
multiplying one way feels easier than the other.
seen one of these on a test? See it on a real question: TEKS 3.6C, area with unit squares, or TEKS 4.5D, perimeter and area of rectangles.
The same problem, other ways