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Niech:
x=0,(2013) /*10000
10 000 x = 2013,(2013)
Skąd:
10 000 x - x = 2013,(2013) - 0,(2013)
9999 x = 2013 /:9999
Skąd:
Jak obliczyć 154 * 671 ?
154 * 671 = (150 + 4)(670+1) = 150*670 + 150 + 670*4 + 4 =
100 500 + 150 + 2 680 + 4 = 100 500 + 2 834= 103 334
Dalej otrzymuję: