\(\sqrt{\left(-7\right)^2}+\sqrt{\frac{25}{16}}-\frac{3}{2}\\ =7+\frac{5}{4}-\frac{3}{2}\\ =\frac{28}{4}+\frac{5}{4}-\frac{6}{4}\\ =\frac{28+5-6}{4}=\frac{27}{4}\)
= 7 + 5/4 - 1/2
= 28/4 + 5/4- 6/4
= 28 + 5 - 6/4
=27/4
chuc ban hc tot
= 7 + \(\frac{5}{4}\) - \(\frac{1}{2}\)
= \(\frac{28}{4}\) + \(\frac{5}{4}\)- \(\frac{6}{4}\)
= 28 + 5 - \(\frac{6}{4}\)
= \(\frac{27}{4}\)
\(\)
bài 1: tính
a) 3/4+(-5/2)+(-3/5)
b) \(\sqrt{\left(7\right)^2}+\sqrt{\dfrac{25}{16}-\dfrac{3}{2}}\)
c)\(\dfrac{1}{2}.\sqrt{100}-\sqrt{\dfrac{1}{16}+\left(\dfrac{1}{3}\right)^0}\)
Bài 1:Thực hiện phép tính:
1,\(\frac{11}{24}-\frac{5}{41}+\frac{13}{24}+0,5-\frac{36}{41}\)
2,\(-12:(\frac{3}{4}-\frac{5}{6})^2\)
3,\(\frac{7}{23}.[(-\begin{matrix}8\\6\end{matrix})-\frac{45}{18}]\)
4,\(23\frac{1}{4}.\frac{7}{5}-13\frac{1}{4}:\frac{5}{7}\)
5,\((1+\frac{2}{3}-\frac{1}{4})(0,8-\frac{3}{4})^2\)
6,\(16\frac{2}{7}:(\frac{-3}{5})+28\frac{2}{7}:\frac{3}{5}\)
7,\((2^2:\frac{4}{3}-\frac{1}{2}).\frac{6}{5}-17\)
8,\((\frac{1}{3})^{50}.\left(-9\right)^{25}-\frac{2}{3}:4\)
9,\(\frac{3}{5}:(\frac{-1}{15}-\frac{1}{6})+\frac{3}{5}:(\frac{-1}{3}-1\frac{1}{15})\)
10,\(\left(-6,5\right).5,7+5,7.\left(-3,5\right)\)
11,\(10.\sqrt{0,01.\frac{16}{9}+3\sqrt{49}-\frac{1}{6}\sqrt{ }4}\)
12,\(\frac{2^4.2^6}{\left(2^5\right)^2}-\frac{2^5.15^3}{6^3.10^2}\)
giúp mình với
1, tính
a, \(7\times\sqrt{\dfrac{6^2}{7^2}}-\sqrt{25}+\sqrt{\dfrac{\left(-3\right)^2}{2}}\)
b, \(-\sqrt{\dfrac{64}{49}}-\dfrac{3}{5}\times\sqrt{\dfrac{25}{64}}+\sqrt{0,25}\)
c, \(\sqrt{\dfrac{10000}{5}}-\dfrac{1}{4}.\sqrt{\dfrac{16}{9}}+\sqrt{\dfrac{\left(-3\right)^2}{\left(4\right)}}\)
d, \(\left|\dfrac{1}{4}-\sqrt{0,0144}\right|-\dfrac{3}{2}+\sqrt{\dfrac{81}{169}}\)
Tìm y :
\(\left|y=\frac{1}{3}\right|-\sqrt{\frac{1}{16}}=\sqrt{\frac{1}{9}}\)
\(\left(\frac{1}{2}\right)^2+\left(-\frac{3}{4}\right)-\frac{\sqrt{9}}{12}\)
Ta có : \(\sqrt{25}=5;-\sqrt{25}=-5;\sqrt{\left(-5\right)^2}=\sqrt{25}=5\)
Theo mẫu trên, hãy tính :
a) \(\sqrt{36}\)
b) \(-\sqrt{16}\)
c) \(\sqrt{\dfrac{9}{25}}\)
d) \(\sqrt{3^2}\)
e) \(\sqrt{\left(-3\right)^2}\)
Câu 1 : Thực hiện phép tính :
a) 3,5 + \(\sqrt{\frac{49}{25}-}\sqrt{0,36}\)
Câu 2 : Tìm x, biết :
a) \(\frac{4}{9}\): (x + 0,4)=\(\frac{2}{3}\)
Bài 3 : Tìm x,y biết : 4x=5y và x+y =18
Bài 4 : Thực hiện phép tính :
\(\frac{3}{5}\) - \(\frac{3}{5}\) (\(\frac{4}{3}\)-\(\left(\frac{1}{2}\right)^2\)
\(\sqrt{\frac{9}{100}}\) - \(\sqrt{0,25}+12\)
Bài 5 : Tìm x, biết :
a) \(1\frac{2}{5}\) : \(\left(\frac{2}{3}+x\right)\) = \(\frac{7}{3}\)
Ai giúp mik với mik đang vội !!! Còn 30 phút nữa thôi
a,\(\sqrt{1}+\sqrt{9}+\sqrt{25}+\sqrt{49}+\sqrt{81}\) c\(\sqrt{0,04}+\sqrt{0,09}+\sqrt{0,16}\)
b,\(\sqrt{\dfrac{1}{4}}+\sqrt{\dfrac{1}{9}}+\sqrt{\dfrac{1}{36}}+\sqrt{\dfrac{1}{16}}\) e\(\sqrt{2^2}+\sqrt{4^2}+\sqrt{\left(-6^2\right)}+\sqrt{\left(-8^2\right)}\)
j,\(\sqrt{1,44}-\sqrt{1,69}+\sqrt{1,96}\)
g, \(\sqrt{\dfrac{4}{25}}+\sqrt{\dfrac{25}{4}}+\sqrt{\dfrac{81}{100}}+\sqrt{\dfrac{9}{16}}\)
d\(\sqrt{81}-\sqrt{64}+\sqrt{49}\)
Tính
\(\left\{\left[\left(2\sqrt{2}\right)^2:2,4\right]\left[5,25:\left(\sqrt{7}\right)^2\right]\right\}:\left\{\left[2\dfrac{1}{7}:\dfrac{\left(\sqrt{5}\right)^2}{7}\right]\right\}:\left[2^2:\dfrac{\left(2\sqrt{2}\right)^2}{\sqrt{81}}\right]\)
