Сравните дроби 7/9и20/27 11/18и17/24 7/15и9/25

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Сравните дроби 7/9и20/27 11/18и17/24 7/15и9/25

Алгебра (12 баллов) | 81 просмотров
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1) 7/9 = (7*3)/(9*3) = 21/27 > 20/27 2) 11/18 = (11*4)/(18*4) = 44/72; 17/24 = (17*3)/(24*3) = 51/72 44/72 < 51/72; 11/18 < 17/24 3) 7/15 = (7*5)/(15*5) = 35/75; 9/25 = (9*3)/(25*3) = 27/75 35/75 > 27/75; 7/15 > 9/25

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1.

image\frac{20}{27}" alt=" \frac{7}{9}=\frac{21}{27}\\ \\ \frac{7}{9}>\frac{20}{27}" align="absmiddle" class="latex-formula">


2.

\frac{11}{18} =\frac{44}{72}\\ \\ \frac{17}{24}= \frac{51}{72}\\ \\ \frac{11}{18}<\frac{17}{24}


3.

image\frac{9}{25} " alt=" \frac{7}{15} =\frac{35}{75}\\ \\ \frac{9}{25}= \frac{27}{75}\\ \\ \frac{7}{15}>\frac{9}{25} " align="absmiddle" class="latex-formula">

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