а) 98*102 = 98*100 + 98*2 = 9800 + 196 = 9996
б) 4,9*5,1 = 4,9*5 + 4,9*0,1 = 24,5 + 0,49 = 24,99
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а) 98*102 = 98*100 + 98*2 = 9800 + 196 = 9996
б) 4,9*5,1 = 4,9*5 + 4,9*0,1 = 24,5 + 0,49 = 24,99