6 1/6 + 1 5/6
là hỗn số nha
giúp mị
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\(3\frac{2}{5}\cdot2\frac{1}{7}=\frac{17}{5}\cdot\frac{15}{7}=\frac{255}{35}\)
\(8\frac{1}{6}:2\frac{1}{2}=\frac{49}{6}:\frac{5}{2}=\frac{49}{6}\cdot\frac{2}{5}=\frac{98}{30}\)
Quy tắc chuyển hỗn số thành phân số:
Phần nguyên x mẫu + tử thì ra tử mẫu giữ nguyên
25%- \(\frac{5}{4}+1\frac{5}{6}\)= \(\frac{1}{4}-\frac{5}{4}+1\frac{5}{6}\)= \(-1+1\frac{5}{6}\)= \(\frac{5}{6}\)
\(x+\frac{2}{3}=2\frac{1}{2}\)
\(x+\frac{2}{3}=\frac{5}{2}\)
\(x=\frac{5}{2}-\frac{2}{3}\)
\(x=\frac{11}{6}\)
\(8,75.x+1,25.x=26,3\)
\(x.\left(8,75+1,25\right)=26,3\)
\(x.10=26,3\)
\(x=26,3\div10\)
\(x=2,63\)
Ta có:
=>ad+ab<bc+ab
=>a(b+d)>b(a+c)
=>\(\frac{a}{b}< \frac{a+c}{b+d}\) (1)
=>ad+cd<bc+cd
=>d(a+c)<c(b+d)
=>\(\frac{a+c}{b+d}< \frac{c}{d}\) (2)
Từ (1) và (2) => \(\frac{a}{b}< \frac{a+c}{b+d}< \frac{c}{d}\)(đpcm)
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\(\frac{-1}{3}=\frac{-8}{24}>\frac{-9}{24}>\frac{-10}{24}>\frac{-11}{24}>\frac{-12}{24}=\frac{-1}{2}\)
---------------
\(\frac{-1}{5}< \frac{-1}{4}< \frac{-1}{3}< \frac{-1}{2}< -1< 0< \frac{1}{5}\)
\(\frac{-1}{2}=\frac{\left(-1\right).12}{2.12}=\frac{-12}{24}\)
\(\frac{-1}{3}=\frac{\left(-1\right).8}{3.8}=\frac{-8}{24}\)
\(\frac{-8}{24}< x< \frac{-12}{24}\)
\(\Rightarrow x=\left\{\frac{-9}{24};\frac{-10}{24};\frac{-11}{24}\right\}\)
\(\frac{1}{6}:\left(x-\frac{1}{3}\right)-\frac{5}{6}=\frac{5}{9}\times2\frac{8}{6}\)
\(\Leftrightarrow\frac{1}{6}:\left(\frac{3x-1}{3}\right)=\frac{5}{6}+\frac{5}{9}\times2\frac{4}{3}\)
\(\Leftrightarrow\frac{1}{6}\times\frac{3}{3x-1}=\frac{5}{6}+\frac{5}{9}\times\frac{10}{3}\)
\(\Leftrightarrow\frac{1}{2}\times\frac{1}{3x-1}=\frac{45+100}{54}\)
\(\Leftrightarrow\frac{1}{3x-1}=\frac{2\cdot145}{54}=\frac{145}{27}\)
\(\Leftrightarrow3x-1=\frac{27}{145}\Leftrightarrow3x=\frac{27}{145}+1=\frac{172}{145}\)
\(\Leftrightarrow x=\frac{172}{435}\).
\(6\frac{1}{6}+1\frac{5}{6}\)
\(=\frac{37}{6}+\frac{11}{6}\)
\(=\frac{37+11}{6}\)
\(=\frac{48}{6}\)
\(=8\)
\(6\frac{1}{6}+1\frac{5}{6}=\frac{37}{6}+\frac{11}{6}=\frac{37+11}{6}=\frac{48}{6}=8\)
Hk tốt................
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