Proteins, from the Greek proteios, meaning first, are a class of organic compounds which are present in and vital to every living cell. In the form of skin, hair, callus, cartilage, muscles, tendons and ligaments, proteins hold together, protect, and provide structure to the body of a multi-celled organism. In the form of enzymes, hormones, antibodies, and globulins, they catalyze, regulate, and protect the body chemistry.
Definition of long division for Students. : division in arithmetic that involves several steps that are written out.
For example, in the expression 30 Ã· 5 x 7, division is done first (30 Ã· 5 = 6) and then multiplication follows (6 x 7) for an answer of 42. With several operations, PEMDAS prevents confusion. In the example 8 + 7 x (4+5), the numbers inside the parentheses are addressed first to get 9. Then the multiplication (7 x 9) is performed to obtain 63. Finally, 8 is added for a total of 71.