[2,721:0,25+6166:2,5]*1,25
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a: \(=\left(1.25\right)^{16}\cdot8^{16}\cdot8=8\cdot10^{16}\)
b: \(=\left(\dfrac{5}{2}\right)^{13}\cdot4^{13}\cdot4^2=10^{13}\cdot4^2\)
c: \(=\left(0.25\right)^4\cdot8^4\cdot8^2=2^4\cdot8^2=64\cdot16=1024\)
d: \(=\left(\dfrac{1}{2}\right)^{15}\cdot2^{18}=2^3=8\)
e: \(=\left(\dfrac{1}{3}\cdot6\right)^7\cdot\left(\dfrac{1}{2}\right)^7\cdot\dfrac{1}{2}=2^7\cdot\left(\dfrac{1}{2}\right)^7\cdot\dfrac{1}{2}=\dfrac{1}{2}\)
+) 9,65 x 0,4 x 2,5
= 9,65 x ( 0,4 x 2,5 )
= 9,65 x 1
= 9,65
+) 7,38 x 1,25 x 80
= 7,38 x (1,25 x 80)
= 7,38 x 100
= 738
+) 0,25 x 40 x 9,84
= 10 x 9,84
= 98,4
+) 34,3 x 5 x 0,4
= 34,3 x 2
= 68,6
9,65 x 0,4 x 2,5
= 9,65 x ( 0,4 x 2,5 )
= 9,65 x 1
= 9,65
7,38 x 1,25 x 80
= 7,38 x (1,25 x 80)
= 7,38 x 100
= 738
0,25 x 40 x 9,84
= 10 x 9,84
= 98,4 34,3 x 5 x0,4
= 34,3 x 2
= 68,6
9,65 x 0,4 x 2,5
= 9,65 x ( 0,4 x 2,5 )
= 9,65 x 1
= 9,65
+) 7,38 x 1,25 x 80
= 7,38 x (1,25 x 80)
= 7,38 x 100
= 738
+) 0,25 x 40 x 9,84
= 10 x 9,84
= 98,4
+) 34,3 x 5 x 0,4
= 34,3 x 2
= 68,6
\(9,65\times0,4\times2,5\)
\(=9,65\times1\)
\(=9,65\)
\(0,25\times40\times9,84\)
\(=10\times9,84\)
\(=98,4\)
\(7,38\times1,25\times80\)
\(=7,38\times100\)
\(=738\)
\(34,3\times5\times0,4\)
\(=34,3\times2\)
\(=68,6\)
\(9,65\times0,4\times2,5\)
\(=9,65\times1\)
\(=9,65\)
\(0,25\times40\times9,84\)
\(=10\times9,84\)
\(=98,4\)
\(7,38\times1,25\times80\)
\(=7,38\times100\)
\(=738\)
\(34,3\times5\times0,4\)
\(=34,3\times2\)
\(=68,6\)
a, \(\left(x-158\right):6=20\)
\(x-158=20.6\)
\(x-158=120\)
\(x=120+158\)
\(x=278\)
~~~Hok tốt~~~
a) \(\left(x-158\right):6=20\)
\(\Leftrightarrow x-158=\frac{20}{6}=\frac{10}{3}\)
\(\Leftrightarrow x=\frac{10}{3}+158\)
\(\Leftrightarrow x=\frac{484}{3}\)
Vậy : \(x=\frac{484}{3}\)
b) \(x-1,25.4=2,5\)
\(\Leftrightarrow x-5=2,5\)
\(\Leftrightarrow x=2,5+5\)
\(\Leftrightarrow x=7,5\)
Vậy : \(x=7,5\)
c) \(x+0,25=\frac{43}{4}-\frac{18}{5}\)
\(\Leftrightarrow x+\frac{1}{4}=\frac{143}{20}\)
\(\Leftrightarrow x=\frac{143}{20}-\frac{1}{4}\)
\(\Leftrightarrow x=\frac{69}{10}\)
Vậy : \(x=\frac{69}{10}\)
+) 9,65 x 0,4 x 2,5
= 9,65 x ( 0,4 x 2,5 )
= 9,65 x 1
= 9,65
+) 7,38 x 1,25 x 80
= 7,38 x (1,25 x 80)
= 7,38 x 100
= 738
+) 0,25 x 40 x 9,84
= 10 x 9,84
= 98,4
+) 34,3 x 5 x 0,4
= 34,3 x 2
= 68,6
3096.605
= ( 10,884+2466,4) x 1,25
=2477,284 x 1,25
= 3096,605