To solve a problem in two ways. In shop two boxes with apples. In one box of 50 kg. apples, in another - 40 kg. In a day sold 30 kg. apples. How many kg. apples remained in shop?

1) 50+40=90 (kg) of All of apples 2) 90-30=60 (kg) of Apples remained to 1) 50-30=20 (kg) of Apples remained in І a box 2) 20+40=60 (kg) of Apples of all remained
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