Question
Mr Justin had 57 soccer balls. He gave 23 of his soccer balls to Mark. During the practice, Mr Justin lost 4 soccer balls. How many soccer balls did Mr Justin have in the end?
4 m

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Mr Justin had 57 soccer balls. He gave 23 of his soccer balls to Mark. During the practice, Mr Justin lost 4 soccer balls. How many soccer balls did Mr Justin have in the end?