Question

Calcule o valor das expressões:

A) [(- 3/8 + 4/16 +3) . 1/2 ] =
B) [( -3/4 . 16/81 + 0,3)] . (-3/4) =

Answer 1

A)
$[(\frac{-3}{8}+\frac{4}{16}+3)*\frac{1}{2}]=\\\\=[(\frac{-3}{8}+\frac{1}{4}+3)*\frac{1}{2}]=\\\\=[(\frac{-3+2+24}{8})*\frac{1}{2}]=\\\\=[\frac{23}{8}*\frac{1}{2}]=\\\\=\frac{23}{16}$

B)
$[(\frac{-3}{4}*\frac{16}{81}+0,3)]*(\frac{-3}{4})=\\\\=[(\frac{-48}{324}+\frac{3}{10})]*(\frac{-3}{4})=\\\\=[\frac{-4}{27}+\frac{3}{10}]*(\frac{-3}{4})=\\\\=[\frac{-40+81}{270}]*(\frac{-3}{4})=\\\\=[\frac{41}{270}]*(\frac{-3}{4})=\\\\=\frac{-123}{1080}=\\\\=\frac{-41}{360}$

Answer 2

Resposta:

tbm n sei

Explicação passo-a-passo: