Katrina has 120 cookies to sell at her bakery. She plans to take home any cookies she doesn’t sell by the end of the day. In the morning, she sells 3 dozen cookies. During the lunch rush, she sells 57 cookies. In the afternoon, she sells 16 more cookies. How many cookies does she have left to take home? Give me reasons, before answering the question
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There are 12 cookies in 1 dozen, so in the morning, she sold 12 x 3 dozen = 36 cookies. Throughout the day, she sold 36 cookies in the morning + 57 cookies at lunch + 16 cookies in the afternoon = 109 cookies. She started with 120 cookies – 109 cookies sold = 11 cookies to take home. So the final answer is 11.
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