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 A large garbage bag holds 12 and one third12 1 3 pounds of leaves.​ Yesterday, you filled 3 and four fifths3 4 5 bags with leaves before lunch. How many pounds of leaves did you bag before​ lunch? If you filled another 8 and one fifth8 1 5 bags after​ lunch, how many pounds of leaves did you bag in all​ yesterday? Use pencil and paper. Describe in words two ways to solve this problem.

 Nov 5, 2015
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12 + 1/3   =   37/3

3 + 4/5  =      19/5

8 + 1/5  =      41/5

 

So....before lunch you bagged

 

(37/3)(19/5)  = 703/15 lbs

 

And after lunch you bagged

 

(37/3) (41/5)  = 1517/15 lbs

 

Adding these  we get   [703/15 + 1517/15]    = 148 lbs

 

A second way to do it is to combine both procedures into one

 

(37/3) [ 703/15 + 1517/15]     =  (37/3) [ 2220 / 15]   = 148 lbs

 

 

 

cool cool cool

 Nov 5, 2015

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