Question

ajutati-ma la primele 14 exerciţii.primului coroana.

Answer 1

Rezolvările le ai în atașament ( daca vrei poti sa faci si simplificari la rez . eu nu am facut )

Answer 2

$1)\frac{1}{2}+\frac{1}{5}=\frac{5+2}{10}=\frac{7}{10}$

$2)\frac{1}{5}+\frac{2}{7}=\frac{7+10}{35}=\frac{17}{35}$

$3)\frac{2}{7}+\frac{3}{10}=\frac{20+21}{70}=\frac{41}{70}$

$4)\frac{3}{10}+\frac{4}{9}=\frac{27+40}{90}=\frac{67}{90}$

$5)\frac{4}{9}+\frac{3}{8}=\frac{32+27}{72}=\frac{59}{72}$

$6)\frac{3}{8}+\frac{1}{10}=\frac{30+8}{80}=\frac{38}{80}=\frac{19}{40}$

$7)\frac{1}{10}+\frac{2}{5}=\frac{5+20}{50}=\frac{25}{50}=\frac{1}{2}$

$8)\frac{2}{7}+\frac{5}{7}=\frac{2+5}{7}=\frac{7}{7}=1$

$9)\frac{2}{7}+\frac{1}{10}=\frac{20+7}{70}=\frac{27}{70}$

$10)\frac{4}{9}+\frac{2}{5}=\frac{20+18}{45}=\frac{38}{45}$

$11)\frac{12}{15}+\frac{7}{5}=\frac{12+21}{15}=\frac{33}{15}$

$12)\frac{6}{13}+\frac{3}{26}=\frac{12+3}{26}=\frac{15}{26}$

$13)\frac{2}{9}+\frac{3}{12}=\frac{24+27}{108}=\frac{51}{108}=\frac{17}{36}$

$14)\frac{5}{24}+\frac{7}{30}=\frac{25+28}{120}=\frac{53}{120}$