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sklyararina
@sklyararina
September 2021
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Вычислите,обратив десятичную дробь в обыкновенную
а)0,75+1/28+5/7 б)8/15 + 1/3-0,2
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prettypushkova
Verified answer
A) 0,75 = 75/100 = 3/4 (дробь 75/100 сократили на 25)
3/4 + 1/28 + 5/7 = 21/28 + 1/28 + 20/28 = 42/28 = 1 14/28 = 1 1/2
б) 0,2 = 2/10 = 1/5 (дробь 2/10 сократили на 2)
8/15 + 1/3 - 1/5 = 8/15 + 5/15 - 3/15 = 10/15 = 2/3
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Answers & Comments
Verified answer
A) 0,75 = 75/100 = 3/4 (дробь 75/100 сократили на 25)3/4 + 1/28 + 5/7 = 21/28 + 1/28 + 20/28 = 42/28 = 1 14/28 = 1 1/2
б) 0,2 = 2/10 = 1/5 (дробь 2/10 сократили на 2)
8/15 + 1/3 - 1/5 = 8/15 + 5/15 - 3/15 = 10/15 = 2/3