La suma entre 1,3 y su inverso

Mathematics

2 answers:

Stells [14]2 years ago

8 0

Answer:

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Elena L [17]2 years ago

3 0

El número decimal 1,3 lo expresamos en fracción como 13/10

El inverso de esa fracción es otra fracción pero los números de arriba y abajo se intercambian

→ El inverso de 13/10 es 10/13

Ahora hacemos la suma

$\frac{13}{10} + \frac{10}{13}$

$\frac{13\cdot 13+ 10 \cdot 10}{10\cdot 13}$

$\frac{169+ 100}{130}$

$\boxed{\frac{269}{130}}$

El valor decimal

$\boxed{2,0\overline{692307}}$

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1 3/4 − 4/5 = 35 twentieths − what fraction???<br><br>Plss help will give brainliest :)

7nadin3 [17]

let's firstly convert the mixed fractions to improper fractions and then to do away with the denominators, let's multiply both sides by the LCD of all denominators.

$\stackrel{mixed}{1\frac{3}{4}}\implies \cfrac{1\cdot 4+3}{4}\implies \stackrel{improper}{\cfrac{7}{4}} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{7}{4}-\cfrac{4}{5}=\cfrac{35}{20}-\boxed{?}\implies \stackrel{\textit{multipling both sides by }\stackrel{LCD}{20}}{20\left( \cfrac{7}{4}-\cfrac{4}{5} \right)=20\left( \cfrac{35}{20}-\boxed{?} \right)} \\\\\\ 35-16=35-20\boxed{?}\implies 19=35-20\boxed{?}\implies -16=-20\boxed{?} \\\\\\ \cfrac{-16}{-20}=\boxed{?}\implies \cfrac{4}{5}=\boxed{?}$