How To Add Fractions Poster

mary's rectangular posteris 36 inches by 20 inches. susan's rectangular posteris 26 inches by 30 inches. which poster has a larger areaand by how many square inches? so let's think about these. so this is mary's poster.

How To Add Fractions Poster, mary's poster is 36inches by 20 inches. so it's 36 inches by 20 inches. so it might looksomething like that. so the area is going to be36 times 20 square inches.

36 times 2 is 72. so 36 times 20 is goingto be 720 square inches. now let's think aboutsusan's situation. so let's draw susan's poster. susan's poster is 26inches by 30 inches, so 26 inches by 30 inches. so susan's poster mightlook something like that. that's susan's poster, my bestattempt to draw a rectangle. what's the area here?

the area is 26 times30 square inches, which is equalto-- let's actually multiply this oneout-- 26 times 30. we could do 26 times 3 andessentially add a 0 there. so 3 times 6 is 18. 3 times 2 is 6, plus 1 is 78. and actually, i could haveprobably done that in my head. 3 times 20 is 60, plus 3times 6 is 18, gets us 78. but this isn't 3 times 26.

3 times 26 would be 78. 30 times 26 is 780. so it's 780 square inches. so whose poster, whichposter has a larger area? susan's. susan's posterhas a larger area. and by how many square inches? well, hers is 780 squareinches while mary's is 720 square inches.

so it's by 60 square inches. 780 minus 720 would be 60.