Question
PSLE
A shop had a number of hi-fi systems for sale. After selling 30 of them in the morning and 13 of the remainder in the afternoon, it was left with 13 of the hi-fi systems. How many hi-fi systems were left?
2 m

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PSLE
A shop had a number of hi-fi systems for sale. After selling 30 of them in the morning and 13 of the remainder in the afternoon, it was left with 13 of the hi-fi systems. How many hi-fi systems were left?