Question
Nora had some flour in a container. She used 312 kg of the flour in the morning. She added 4 kg of flour into the same container in the afternoon. There was 556 kg of flour in the container in the end. How much flour did Nora have at first? Express your answer in its simplest form.
4 m

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Nora had some flour in a container. She used 312 kg of the flour in the morning. She added 4 kg of flour into the same container in the afternoon. There was 556 kg of flour in the container in the end. How much flour did Nora have at first? Express your answer in its simplest form.