Question

ajutor va rog dau coroana

repedeee

Answer 1

$\frac{5}{6} + \frac{2}{9} = \frac{(5 \times 9 + 2 \times 6)}{54} = \frac{(45 + 12)}{54} =$
$= \frac{57}{54}$
$\frac{5}{6} - \frac{2}{9} = \frac{(45 - 12)}{54} = \frac{33}{54} \div 3 = \frac{11}{18}$
$\frac{13}{6} + b = 3$
$b = 3 - \frac{13}{6} = \frac{(6 \times 3 - 13)}{6} = \frac{(18 - 13)}{6}$
$= \frac{5}{6}$
$\frac{13}{6} - \frac{5}{6} = \frac{8}{6} \div 2 = \frac{4}{3}$
$\frac{7}{8} - b = \frac{1}{2}$

B=7/8-1/2
B=(7-4)/8
B=3/8
7/8+3/8=10/8 :2=5/4

A+3/10=2
A=2-3/10
A=(2x10-3)/10
A=17/10
17/10-3/10=14/10 :2=7/5

A-13/12=2/3
A=2/3+13/12
A=(4x2+13)/12
A=(8+13)/12
A=21/12

21/12+13/12=33/12 :3=11/4

5/6x2/9=10/54 :2=5/27
5/6:2/9=5/6x9/2=45/12 :3=15/4

13/6x5/6=65/36

13/6:5/6=13/6x6/5=13/5

7/8x3/8=21/64
7/8:3/8=7/8x8/3=7/3