Question

Resolva a expressão:
a) (-5)-(-3)+(+2)-(+1)+(-8)
B) (12-2)-3+(8+7-5)
C) 1/5+ {[4/9:(1/2x2/4-1/9)]}
D) (4-4/5):(9+1/3)
E) 0,0006.10elevado5/ 0,096.10elevado3=

Por favor preciso dos cálculos

Answer 1

A) (-5)-(-3)+(+2)-(+1)+(-8)=
-5+3+2-1-8=-9
 
B) (12-2)-3+(8+7-5)=
10-3+10=17

C) $\frac{1}{5}+ \{[\frac{4}{9}\div (\frac{1}{2}*\frac{2}{4}-\frac{1}{9})]\}=\\ \\ \frac{1}{5}+ \{[\frac{4}{9}\div (\frac{1}{4}-\frac{1}{9})]\}=\\ \\ \frac{1}{5}+ \{[\frac{4}{9}\div (\frac{9-4}{36})]\}=\\ \\ \frac{1}{5}+ \{[\frac{4}{9}\div (\frac{5}{36})]\}=\\ \\ \frac{1}{5}+ \{[\frac{4}{9}* \frac{36}{5}]\}=\\ \\ \frac{1}{5}+ \frac{16}{5}=\frac{17}{5}$


D) $(4-\frac{4}{5})\div(9+\frac{1}{3})=\\ \\ (\frac{20-4}{5})\div \frac{27+1}{3})=\\ \\ \frac{21}{5}\div\frac{28}{3}=\\ \\ \frac{21}{5}* \frac{3}{28}=\frac{9}{20}$


E) $0,0006.10^5 \div 0,096.10^3=6.10^9\div9,6.10^{11}=\\ \\ \frac{6}{9,6}.10^{2}=0,625.10^2=62,5$