A)\(\frac{3}{5}=\frac{42}{70};\frac{4}{7}=\frac{40}{70};\frac{5}{10}=\frac{35}{70}\)

B)\(\frac{4}{9}=\frac{8}{18};\frac{11}{18}=\frac{11}{18};\frac{5}{6}=\frac{15}{18}\)

1

a)\(\frac{35}{56}\)và \(\frac{35}{50}\)

b)\(\frac{36}{56}\)và \(\frac{36}{39}\)

Nhớ k cho mik nha ...

A) \(\frac{35}{56}\)và \(\frac{35}{50}\)

B) \(\frac{36}{56}\) và \(\frac{36}{39}\)

k cho mình nhaa <3

hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

củ6e

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msc là 24

cau tim BCNN la ra MC nho nhat

msc 24

Ta có A=\(\frac{1}{5}\)+\(\left(\frac{1}{13}+\frac{1}{14}+\frac{1}{15}\right)\)+\(\left(\frac{1}{61}+\frac{1}{62}+\frac{1}{63}\right)\)

Ta lại có: \(\frac{1}{5}=\frac{1}{5}\)

\(\frac{1}{13}=\frac{1}{13},\frac{1}{13}>\frac{1}{14},\frac{1}{13}>\frac{1}{15}\)

\(\frac{1}{61}=\frac{1}{61},\frac{1}{61}>\frac{1}{62},\frac{1}{61}>\frac{1}{63}\)

\(\frac{1}{5}+\frac{1}{13}+\frac{1}{14}+\frac{1}{15}+\frac{1}{61}+\frac{1}{62}+\frac{1}{63}\)<\(\frac{1}{5}+\frac{1}{13}+\frac{1}{13}+\frac{1}{13}+\frac{1}{61}+\frac{1}{61}+\frac{1}{61}\)

A<\(\frac{1}{5}+\frac{1}{13}x3+\frac{1}{61}x3\)

A<\(\frac{1}{5}+\frac{3}{13}+\frac{3}{61}=0,4799...< \frac{1}{2}\)

Vậy A<\(\frac{1}{2}\)

Mình viết phân số lâu lắm đó tk cho mình nha. Mình cảm ơn nhiều ^-^

A bé hơn \(\frac{1}{2}\)