Question

so sánh: 7 4/15 và 6 1/2

Answer 1

\(7\dfrac{4}{15}=\dfrac{109}{15};6\dfrac{1}{2}=\dfrac{13}{2}\)

Quy đồng: MCNN: 30

\(\dfrac{109}{15}=\dfrac{218}{30};\dfrac{13}{2}=\dfrac{195}{30}\)

Vì: 218 > 195 nên \(\dfrac{218}{30}>\dfrac{195}{30}\)

Vậy \(7\dfrac{4}{15}>6\dfrac{1}{2}\).

Answer 2

74/15<61/2

Answer 3

`7 4/15 > 7`

`6 1/2 < 7`

`-> 7 4/15 > 6 1/2`

Answer 4

\(7\dfrac{4}{15}\) và \(6\dfrac{1}{2}\) = \(\dfrac{109}{15}\) và \(\dfrac{13}{2}\) = \(\dfrac{218}{30}\) và \(\dfrac{195}{30}\) = \(\dfrac{218}{30}\) > \(\dfrac{195}{30}\) nên \(\dfrac{109}{15}\) > \(\dfrac{13}{2}\)

Answer 5

So sánh \(7\dfrac{4}{15}\) và \(6\dfrac{1}{2}\)

\(7\dfrac{4}{15}=\dfrac{74}{15}; 6\dfrac{1}{2}=\dfrac{61}{2}\)

\(\dfrac{74}{15}=\dfrac{74\times2}{15\times2}=\dfrac{148}{30}\) ;  \(\dfrac{61}{2}=\dfrac{61\times15}{2\times15}=\dfrac{915}{30}\)

Do \(\dfrac{148}{30}< \dfrac{915}{30}\) nên \(7\dfrac{4}{15}< 6\dfrac{1}{2}\)