Question

alguém pode me ajudar a resolver??Eu preciso para amanhã ​

Answer 1

Resposta:

a)

Calculando:

$(-2-\frac{2}{5})(-\frac{3}{4} )^2\\\\(\frac{-12}{5} )(\frac{9}{16}) \\\\(\frac{-3}{5} )(\frac{9}{4} )\\\\\frac{-27}{20} =-1,35$

b)

Calculando:

$1-(\frac{1}{3})^3 \div (\frac{1}{2}-2 )^2\\\\(1-\frac{1}{27}) \div (\frac{-3}{2})^2\\\\\frac{26}{27} \div \frac{9}{4} \\\\\frac{(26)(4)}{(27)(9)} =\frac{104}{243} =0,43$

c)

Calculando:

$(5-\frac{1}{2} )^2 \div (\frac{1}{2}-2 )^3\\\\(\frac{9}{2}) ^2 \div (\frac{-3}{2} )^3\\\\\frac{81}{4} \div \frac{-27}{8} \\\\\frac{81*8}{4*(-27)}\\\\ \frac{648}{-108}\\\\-6$

d)

Calculando:

$(0,1+\frac{1}{5}) \div (-0,02+\frac{1}{100} )\\\\(0,1+0,2) \div (-0,02 + 0,01)\\\\(0,3) \div (-0,01)$

Multiplicando numerador e denominador por 100:

$\frac{30}{-1} \\\\-30$

e)

Calculando:

$(\frac{1}{5}-\frac{1}{2} )-(\frac{1}{3} -\frac{1}{4} )*\frac{2}{5} \\\\(\frac{-3}{10} )-(\frac{1}{12} )*\frac{2}{5}\\\\(\frac{-3}{10} )-(\frac{1}{30} ) \\\\\frac{-10}{30} \\\\\frac{-1}{3} =-0,333...$

f)

Calculando:

$\frac{-5}{8}+\frac{1}{4}*0,2+\frac{1}{2} \\\\\frac{-5}{8}+\frac{1}{4}*\frac{1}{5} +\frac{1}{2} \\\\\frac{-5}{8}+\frac{1}{20}+\frac{1}{2} \\\\\frac{-25+2+20}{40} \\\\\frac{-3}{40} =-0,075$

Valeu!