Question
Cathy had some rice flour in a container. She used 323 kg of the rice flour in the morning. She added 5 kg of rice flour into the same container in the afternoon. There was 556 kg of rice flour in the container in the end. How much rice flour did Cathy have at first? Express your answer in its simplest form.
4 m

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Cathy had some rice flour in a container. She used 323 kg of the rice flour in the morning. She added 5 kg of rice flour into the same container in the afternoon. There was 556 kg of rice flour in the container in the end. How much rice flour did Cathy have at first? Express your answer in its simplest form.