Пусть имеем рациональные числа а=4дробь 5 и б=5дробь 6. Вычислит: 1) а+b и 2)а-b.​

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's

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How much is 32 out of 40 written as a percentage? convert fraction (ratio) 32 / 40 answer:   80%