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Mathematics 15 Online
OpenStudy (anonymous):

Shayla is baking muffins that require 1/2 cup vegetable oil. She only has 1/3 cup of vegetable oil left. How much more does she need?

jimthompson5910 (jim_thompson5910):

you need to find 1/2 - 1/3

jimthompson5910 (jim_thompson5910):

You can't subtract right away because the denominators are not the same

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