a) Tìm x
\(\frac{8}{5}+x=\frac{17}{3}\)
\(\Rightarrow x=\frac{17}{3}-\frac{8}{5}\)
\(\Rightarrow x=\frac{61}{15}\)
\(x-\frac{17}{14}=\frac{80}{11}\)
\(\Rightarrow x=\frac{80}{11}+\frac{17}{14}\)
\(\Rightarrow x=\frac{1307}{154}\)
b) Tính nhanh
\(52\times95+47\times95+95\)
\(=95\times\left(52+47+1\right)\)
\(=95\times100\)
\(=9500\)
\(a.\)\(\frac{8}{5}+x=\frac{17}{3}\)
\(\Leftrightarrow x=\frac{17}{3}-\frac{8}{5}\)
\(\Leftrightarrow x=\frac{85}{15}-\frac{24}{15}\)
\(\Leftrightarrow x=\frac{61}{15}\)
\(x-\frac{17}{14}=\frac{80}{11}\)
\(\Leftrightarrow x=\frac{80}{11}+\frac{17}{14}\)
\(\Leftrightarrow x=\frac{1120}{154}+\frac{187}{154}\)
\(\Leftrightarrow x=\frac{1307}{154}\)
\(b.\)Cách tính nhanh nhé:
\(52.95+47.95+95\)
\(=52.95+47.95+95.1\)
\(=95.\left(52+47+1\right)\)
\(=95.100\)
\(=9500\)
~ Rất vui vì giúp đc bn ~
a) Tìm x:
+) \(\frac{8}{5}+x=\frac{17}{3}\)
\(\Leftrightarrow x=\frac{17}{3}-\frac{8}{5}\)
\(\Leftrightarrow x=\frac{61}{15}\)
Vậy \(x=\frac{61}{15}\)
+) \(x-\frac{17}{14}=\frac{80}{11}\)
\(\Leftrightarrow x=\frac{80}{11}+\frac{17}{14}\)
\(\Leftrightarrow x=\frac{1307}{154}\)
Vậy \(x=\frac{1307}{154}\)
b) Tính nhanh:
\(52.95+47.95+95\)
\(=95.\left(52+47+1\right)\)
\(=95.100\)
\(=9500\)
