Question

13 supra 39+105supra 42+70supra 100​

Answer 1

Salutare!

$\bf \dfrac{13}{39} +\dfrac{105}{42}+\dfrac{70}{100}=$

$\bf \dfrac{\not13}{\not39} +\dfrac{\not105}{\not42}+\dfrac{\not70}{\not100}=$

$\bf \dfrac{1}{3} +\dfrac{5}{2}+\dfrac{7}{10}=$

$\bf \dfrac{1\cdot10}{3\cdot10} +\dfrac{5\cdot 15}{2\cdot15}+\dfrac{7\cdot3}{10\cdot3}=$

$\bf \dfrac{10}{30} +\dfrac{75}{30}+\dfrac{21}{30}=$

$\bf \dfrac{10+75+21}{30}=$

$\bf \dfrac{106}{30}=$

$\bf \dfrac{\not106}{\not30}=$

$\boxed{\bf \dfrac{53}{15}}$

Answer 2

Salut! Am ataşat rezolvarea. :)