Question

18:(- 6)+5 . 3-8 . 7:14

b) 7 sobre 3 : 3 sobre 4

c) - 3 sobre 5: 4 sobre 3 + 5:(- 1 sobre 4)

d)(1 sobre 2 . 6 sobre 5 . 1 sobre 3 : 3 sobre 10 - 1) : 1 sobre 9

e) 4 : 2,222...-3,1:0,2

f)5,34:0,5+2. 1,27

g) 1,444...:1 sobre 3+7,101010...

h) raiz quadrada de 0,81: raiz quadrada 0,25+ 0,5: raiz quadrada 0,09

 

por favor respondem pq estou precisando de pontos e isso e para entregar amanha se nao eu fico de recuperaçao

Answer 1

Olá, Serginho.

 

$<var>a)18:(- 6)+5 . 3-8 . 7:14=-3+15-56:14=3+15-4=\\=18-4=14\\\\ b) \frac73 : \frac34=\frac73 \cdot \frac43=\frac{28}9\\\\ c) - 3/5: 4/3 + 5:(- 1/4)=-\frac35 \cdot \frac34+5 \cdot (-4)=-\frac9{20}-20=\\=\frac{-9-400}{20}=-\frac{409}{20}\\\\ d)(\frac12 . \frac65 . \frac13 : \frac3{10} - 1) : \frac19 = (\frac15 \cdot \frac{10}3-1) \cdot 9 = \frac{10-15}{15} \cdot 9 = \frac{-5}{15} \cdot 9=\\=-\frac13 \cdot 9=-3</var>$

 

$<var>e) 4 : 2,222...-3,1:0,2=4:(2+\frac29)-\frac{31}{10}:\frac2{10}=\\=4:(\frac{18+2}{9})-\frac{31}{10}\cdot \frac{10}2=4 \cdot \frac{9}{20}-\frac{31}2=\frac95-\frac{31}2=\frac{18-155}{10}=\\= \frac{-137}{100}=-1,37\\\\ f)5,34:0,5+2\cdot 1,27=5,34 : \frac5{10} +2,54=5,34 \cdot \frac{10}5+2,54=\\=5,34 \cdot 2+2,54=10,68+2,54=13,22\\\\</var>$

 

$<var>g) 1,444...:\frac13+7,101010...=(1+\frac49):\frac13+7+\frac{10}{99}=\\=(1+\frac49) \cdot 3+7+\frac{10}{99}=3+\frac43+7+\frac{10}{99}=10+\frac43+\frac{10}{99}=\\=\frac{990+132+10}{99}=\frac{1132}{99}\\\\ h) \sqrt{0,81}: \sqrt{0,25}+ 0,5:\sqrt{0,09}=0,9:0,5+0,5:0,3=\\=\frac{9}{10}:\frac5{10}+\frac5{10}:\frac3{10}=\frac{9}{10} \cdot \frac{10}{5}+\frac5{10} \cdot \frac{10}3=\frac95+\frac53=\frac{27+25}{15}=\frac{52}{15}</var>$