Question

a) -2 intregi 3/8-1 intreg 7/10 =;
b) -5 intreg 1/4+1 intreg 1/8=;
c) 4 intreg 3/7-8 intreg 9/14=;
d) -2 intreg 3/4-(-3 intregi 2/5) =;
e) 3intregi 7/9-1 intregi 1/12=;
f) 2intreg 5/8-3 intregi 5/6=;
Ajutati-ma va rog frumos e urgent.....

Answer 1

$a) - 2 \frac{3}{8} - 1 \frac{7}{10}$
$= - \frac{2 \times 8 + 3}{8} - \frac{1 \times 10 + 7}{10}$
$= - \frac{16 + 3}{8} - \frac{10 + 7}{10}$
$= - \frac{19}{8} - \frac{17}{10}$
$= - \frac{95}{40} - \frac{68}{40}$
$= - \frac{95 - 68}{40}$
$= - \frac{27}{40}$
$b) - 5 \frac{1}{4} + 1 \frac{1}{8}$
$= - \frac{5 \times 4 + 1}{4} + \frac{1 \times 8 + 1}{8}$
$= - \frac{20 + 1}{4} + \frac{8 + 1}{8}$
$= - \frac{21}{4} + \frac{9}{8}$
$= - \frac{42}{8} + \frac{9}{8}$
$= - \frac{42 + 9}{8}$
$= - \frac{51}{8}$
$c)4 \frac{3}{7} - 8 \frac{9}{14}$
$= \frac{4 \times 7 + 3}{7} - \frac{8 \times 14 + 9}{14}$
$= \frac{28 + 3}{7} - \frac{112 + 9}{14}$
$= \frac{31}{7} - \frac{121}{14}$
$= \frac{62}{14} - \frac{121}{14}$
$= \frac{62 - 121}{14}$
$= - \frac{59}{14}$
$d) - 2\frac{3}{4} - ( - 3 \frac{2}{5} )$
$= - \frac{2 \times 4 + 3}{4} + \frac{3 \times 5 + 2}{5}$
$= - \frac{8 + 3}{4} + \frac{15 + 2}{5}$
$= - \frac{11}{4} + \frac{17}{5}$

Answer 2

Mult succes în continuare!