Question

Ajude eu nas operação
A)0,1313...+0,1414...
B)2,333...
1,555...
C)6,111...-3,111...
D) 7,222...×1,777...

Answer 1

100x = 13,13
    x= 0,1313  Corta a parte decimal
99x = 13
x = 13/99
100x= 14,14
  x= 0,14
99x= 14
x= 14/99
Ai fica 13/99+14/99
= 27/99

Answer 2

    0,1313...
+  0,1414... 
    0,2727...

B) $\frac{2,33...}{1,55...} =$

$2,333... = \frac{23-2}{9}= \frac{21}{9}$
$1,555...= \frac{15-1}{9}= \frac{14}{9}$

$\frac{21}{9}: \frac{14}{9}= \frac{21}{9}. \frac{9}{14}= \frac{21}{14} = \frac{3}{2}=1,5$

C)    6,111...
     -  3,111...  
        3,111...

D) 7,222... x 1,777... =

$7,222...= \frac{72-7}{9}= \frac{65}{9}$
$1,777...= \frac{17-1}{9} = \frac{16}{9}$

$\frac{65}{9} . \frac{16}{9}= \frac{1040}{81}=12,83 aproximadamente$