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a, \(\sqrt{0,01}-\sqrt{0,05}\\ =\frac{1}{10}-\frac{\sqrt{5}}{10}\\ =\frac{1-\sqrt{5}}{10}\)
b, \(0,5\cdot\sqrt{100}-\sqrt{\frac{1}{4}}\\ =0,5\cdot10-\frac{1}{2}\\ =5-\frac{1}{2}\\ =\frac{9}{2}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Lời giải:
$\sqrt{0,01}-\sqrt{0,25}=0,1-0,5=-0,4$
$0,5\sqrt{100}-\sqrt{\frac{1}{4}}=0,5.10-\frac{1}{2}=\frac{9}{2}$
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(\sqrt{0,01}-\sqrt{0,25}=\sqrt{\left(0,1\right)^2}-\sqrt{\left(0,5\right)^2}=0,1-0,5=-0,4\)b) \(0,5\sqrt{100}-\sqrt{\frac{1}{4}}=0,5\sqrt{10^2}-\sqrt{\left(\frac{1}{2}\right)^2}=0,5.10-\frac{1}{2}=5-\frac{1}{2}=\frac{9}{2}\)
a) \(\sqrt{0,01}+\sqrt{0,25}=0,1\cdot0,5=0,05\)
b) \(0,5\sqrt{100}-\frac{\sqrt{1}}{4}=0,5\cdot10-\frac{1}{4}=5-\frac{1}{4}=\frac{19}{4}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)\(\sqrt{0,01}-\sqrt{0,25}\)
=\(\sqrt{\left(0,1\right)^2}-\sqrt{\left(0,5\right)^2}\)
= 0,1 - 0,5 = - 0,4
b)\(0,5.\sqrt{100}-\sqrt{\dfrac{1}{4}}\)
=0,5.\(\sqrt{10^2}-\sqrt{\left(\dfrac{1}{2}\right)^2}\)
=0,5.10−\(\dfrac{1}{2}\)
= 5 - 0,5
= 4,5.
a) 0,1 - 0,5 = -0,4
b)0,5 . 10 - 0,5 = 5 - 0,5 = 4,5
thầy thông cảm máy em không có dấu căn.
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\)a)
\(\sqrt{0,01}-\sqrt{0,25}=\sqrt{\frac{1}{100}}-\sqrt{\frac{1}{4}}=\frac{1}{10}-\frac{1}{2}=\frac{1}{10}-\frac{5}{10}=\frac{-4}{10}=\frac{-2}{5}\)
b)
\(0,5.\sqrt{100}-\sqrt{\frac{1}{4}}=0,5.10-\frac{1}{2}=5-\frac{1}{2}=\frac{10}{2}-\frac{1}{2}=\frac{9}{2}\)
ai k mình mình k lại
a) \(\sqrt{0,01}=0,1;\sqrt{0,25}=0,5\)= 0,1-0,5 = -0,4
b) = 0,5 x 10 - \(\frac{1}{2}\)= 4,5 . ( Đơn giản nhỉ :) )
![](https://rs.olm.vn/images/avt/0.png?1311)
\(100\times\sqrt{0,01}-0,5\times\sqrt{400}+\sqrt{0,09}=100\times0,1-0,5\times20+0,3\)
\(=10-10+0,3=0+0,3=0,3\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(\sqrt{0.01}-\sqrt{0.25}=0,1-0,5=-0,4\)
b)\(0,5.\sqrt{100}-\sqrt{\frac{1}{4}}=0,5.10-0,5=4,5\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1.
0,2 . \(\sqrt{100}\) - \(\sqrt{\dfrac{16}{25}}\)
= 0,2 . 10 - \(\dfrac{4}{5}\)
= 2 - \(\dfrac{4}{5}\)
= \(\dfrac{6}{5}\)
1/ \(0,2.\sqrt{100}-\sqrt{\dfrac{16}{25}}\)
\(=0,2.10-0,8\)
\(=2-0,8=1,2\)
2/ \(\dfrac{2^7.9^3}{6^5.8^2}\)
\(=\dfrac{93312}{497664}=\dfrac{3}{16}=0,1875\)
3/ \(\sqrt{0,01}-\sqrt{0,25}\)
\(=0,1-0,5\)
\(=-0,4\)
4/ \(0,5.\sqrt{100}-\sqrt{\dfrac{1}{4}}\)
\(=0,5.10-0,5\)
\(=5-0,5=4,5\)
5/ \(7.\sqrt{0,01}+2.\sqrt{0,25}\)
\(=7.0,1+2.0,5\)
\(=0,7+1=1,7\)
6/ \(0,5.\sqrt{100}-\sqrt{\dfrac{1}{25}}\)
\(=0,5.10-0,2\)
\(=5-0,2=4,8\)
a, \(\sqrt{0,01}-\sqrt{0,05}=\sqrt{\frac{1}{100}}-\sqrt{\frac{5}{100}}\)
\(=\frac{\sqrt{1}}{10}-\frac{\sqrt{5}}{10}\)
\(=\frac{1-\sqrt{5}}{10}\)
\(b,0,5.\sqrt{100}-\sqrt{\frac{1}{4}}=0,5.10-\frac{\sqrt{1}}{\sqrt{4}}\)
\(=5-\frac{1}{2}\)
\(=\frac{9}{2}\)
Giải
\(\sqrt{0,01}-\sqrt{0,05}=\frac{1-\sqrt{5}}{10}\)
\(0.5\times\sqrt{100}-\sqrt{\frac{1}{4}}=\frac{29}{2}\)
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