a: 0,36/0,9=1,7/4,25

0,36/1,7=0,9/4,25

0,9/0,36=4,25/1,7

1,7/0,36=4,25/0,9

b: \(\dfrac{-0.8}{0.16}=\dfrac{20}{-4};\dfrac{-0.8}{20}=\dfrac{0.16}{-4};\dfrac{0.16}{-0.8}=\dfrac{-4}{20};\dfrac{20}{-0.8}=\dfrac{-4}{0.16}\)

c: \(\dfrac{-0.3}{-1.71}=\dfrac{2.7}{15.39};\dfrac{-0.3}{2.7}=\dfrac{-1.71}{15.39}\)

\(\dfrac{-1.71}{-0.3}=\dfrac{15.39}{2.7};\dfrac{2.7}{-0.3}=\dfrac{15.39}{-1.71}\)

\(a,13,25\times\left(33,65+66,35\right)-325\)

\(=1325-325\)

\(=1000\)

\(b,95\times4,25+4,25\times6-4,25\)

\(=4,25\times\left(95+6-1\right)=4,25\times10=42,5\)

\(13,25.100-325\)

\(1325-325=1000\)

13,25×(33,65+66,35)−325

=1325−325=1000

95×4,25+4,25×6−4,25

=4,25×(95+6−1)=4,25×10=42,5

4,25 : (0,8 x 25)

= 4,25 : 20

= 0,215

minh ko biet

Đề em ơi

Ta có: \(4,25\cdot17+4,25\cdot53+4,25\cdot30\)

\(=4,25\cdot\left(53+17+30\right)\)

=425

4,25 x 57,43 – 325 + 42,57 x 4,25 

\(=244,0775-325+180,9225\)

\(=100\)

a) \(\frac{x}{4}=\frac{16}{128}\)

\(x.128=4.16\)

\(x.128=64\)

\(x=64:128\)

\(x=\frac{1}{2}\)

Vậy \(x=\frac{1}{2}\)

b) \(\frac{11}{6}=\frac{-x}{5}\)

\(11.5=\left(-x\right).6\)

\(55=\left(-x\right).6\)

\(-x=55:6\)

\(-x=\frac{55}{6}\)

\(\Rightarrow x=-\frac{55}{6}\)

Vậy \(x=-\frac{55}{6}\)

c) \(4,25:8=-3,5:x\)

\(\frac{17}{32}=-3,5:x\)

\(x=\frac{-35}{10}:\frac{17}{32}\)

\(x=-6\frac{10}{17}\)

Vậy \(x=-6\frac{10}{17}\)

\(a.\)

\(\frac{x}{4}=\frac{16}{128}\)

\(\Rightarrow x=\frac{16.4}{128}\)

\(\Rightarrow x=\frac{1}{2}\)

Vậy :       \(x=\frac{1}{2}\)

\(b.\)

\(\frac{11}{6}=\frac{-x}{5}\)

\(\Rightarrow x=\frac{11.5}{-6}\)

\(\Rightarrow x=-\frac{55}{6}\)

Vậy :        \(x=-\frac{55}{6}\)

\(c.\)

\(\frac{4,25}{8}=\frac{-3,5}{x}\)

\(\Rightarrow x=\frac{-3,5.8}{4,25}\)

\(\Rightarrow x=-6\frac{10}{7}\)

Vậy :         \(x=-6\frac{10}{7}\)

\(a,\frac{11}{6}=-\frac{x}{5}\)

\(\Leftrightarrow-x\times6=11\times5\)

\(\Leftrightarrow-6x=55\)

\(\Leftrightarrow x=55:\left(-6\right)\)

\(\Leftrightarrow x=-\frac{55}{6}\)

\(b,4,25:8=-3,5:x\)

\(\Leftrightarrow\frac{17}{32}=--\frac{7}{2}:x\)

\(\Leftrightarrow x=-\frac{7}{2}:\frac{17}{32}\)

\(\Leftrightarrow x=-\frac{112}{17}\)

a) \(\frac{11}{6}=\frac{-x}{5}\)

\(\Rightarrow\frac{55}{30}=\frac{\left(-x\right)\cdot6}{30}\)

\(\Rightarrow55=\left(-x\right)\cdot6\)

\(\Rightarrow-x=\frac{55}{6}\)

\(\Rightarrow x=-\frac{55}{6}\)

b) \(4,25:8=-3,5:x\)

\(\Rightarrow0,53125=-3,5:x\)

\(\Rightarrow x=-3,5:0,53125\)

\(\Rightarrow x=-6,5882...\)

a,=-55/6