Question
Esther had some flour in a container. She used 423 kg of the flour in the morning. She added 4 kg of flour into the same container in the afternoon. There was 456 kg of flour in the container in the end. How much flour did Esther have at first? Express your answer in its simplest form.
4 m

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Esther had some flour in a container. She used 423 kg of the flour in the morning. She added 4 kg of flour into the same container in the afternoon. There was 456 kg of flour in the container in the end. How much flour did Esther have at first? Express your answer in its simplest form.