Answer:
510
Step-by-step explanation:
divide into chunks. I divided it like how you would draw the equal sign.
for top chunk, 20*8=160
for 2nd chunk, 8*25=200
for the last chunk, 15*10=150
add up 160, 200, and 150
the area of this figure is 480
the area of all rectangles is 180 + 90 + 210 = 480
That one may switch two variables in an addition problem
For instance 1+2=3 or 2+1=3
