Question

ajutatima va rog!!! dau coroana!​

Answer 1

$a)8 \frac { 3 } { 7 } - 2 \frac { 2 } { 5 }$

$\frac{56+3}{7}-\frac{2\times 5+2}{5}$

$\frac{59}{7}-\frac{2\times 5+2}{5}$

$\frac{59}{7}-\frac{10+2}{5}$

$\frac{59}{7}-\frac{12}{5}$

$\frac{295}{35}-\frac{84}{35}$

$\frac{295-84}{35}$

$raspuns = > \frac{211}{35}$

$b)3 \frac { 11 } { 15 } - 1 \frac { 7 } { 10 }$

$\frac{45+11}{15}-\frac{1\times 10+7}{10}$

$\frac{56}{15}-\frac{1\times 10+7}{10}$

$\frac{56}{15}-\frac{10+7}{10}$

$\frac{56}{15}-\frac{17}{10}$

$\frac{112}{30}-\frac{51}{30}$

$\frac{112-51}{30}$

$raspuns = > \frac{61}{30}$

$c)1 - \frac { 5 } { 12 }$

$\frac{12}{12}-\frac{5}{12}$

$\frac{12-5}{12}$

$raspuns = > \frac{7}{12}$

$e)6 - 1 \frac { 2 } { 9 }$

$6-\frac{9+2}{9}$

$6-\frac{11}{9}$

$\frac{54}{9}-\frac{11}{9}$

$\frac{54-11}{9}$

$raspuns = > \frac{43}{9}$

$f)2 \frac { 1 } { 18 } - \frac { 1 } { 9 }$

$\frac{36+1}{18}-\frac{1}{9}$

$\frac{37}{18}-\frac{1}{9}$

$\frac{37}{18}-\frac{2}{18}$

$\frac{37-2}{18}$

$raspuns = > \frac{35}{18}$

$g)6 \frac { 3 } { 8 } - 2 \frac { 3 } { 4 }$

$\frac{48+3}{8}-\frac{2\times 4+3}{4}$

$\frac{51}{8}-\frac{2\times 4+3}{4}$

$\frac{51}{8}-\frac{8+3}{4}$

$\frac{51}{8}-\frac{11}{4}$

$\frac{51}{8}-\frac{22}{8}$

$\frac{51-22}{8}$

$raspuns = > \frac{29}{8}=3.625$

Sper ca ti-am fost de folos. Succes!!