Question

Calculati folosind distributivitatea inmultirii fata de adunare si scadere

12/5*(3/8+5/18)

20/3*(5/8-8/15)

10/7*(5/6-7/20)

14/9*(27/32-15/28)


VA ROG URGENT.

Answer 1

Răspuns:

$\frac{12}{5} \times \frac{47}{72} = \frac{1}{5} \times \frac{47}{6} = \frac{47}{30}$

$\frac{20}{3} \times \frac{11}{120} = \frac{1}{3} \times \frac{11}{6} = \frac{11}{18}$

$\frac{10}{7} \times \frac{29}{60} = \frac{1}{7} \times \frac{29}{6} = \frac{29}{42}$

$\frac{14}{9} \times \frac{69}{224} = \frac{1}{9} \times \frac{69}{16} = \frac{1}{3} \times \frac{23}{16} = \frac{23}{48}$