tính:
a. \(\sqrt{81}\)
b.\(\sqrt{8100}\)
c.\(\sqrt{64}\)
d.\(\sqrt{25}\)
e.\(\sqrt{0,64}\)
f.\(\sqrt{10000}\)
g.\(\sqrt{0,01}\)
h.\(\sqrt{\frac{49}{100}}\)
i.\(\sqrt{\frac{0,09}{121}}\)
j.\(\sqrt{\frac{4}{25}}\)
Tính \(\sqrt{81=}\)
\(\sqrt{0,64=}\) \(\sqrt{\frac{49}{100}=}\)
\(\sqrt{8100=}\) \(\sqrt{100=}\)
\(\sqrt{0,01=}\) \(\sqrt{\frac{4}{25}=}\) \(\sqrt{\frac{0,09}{121}=}\)
Ng các bạn giúp mik xin cảm ơn
TÍNH GIÁ TRỊ CÁC BIỂU THỨC SAU
A,\(\sqrt{0,09}-\sqrt{0,64}\)
B,\(0,1\times\sqrt{225}-\sqrt{\frac{1}{4}}\)
C,\(\sqrt{0,36}\times\sqrt{\frac{25}{16}+\frac{1}{4}}\)
D,\(\sqrt{\frac{4}{81}}:\sqrt{\frac{25}{81}-1\frac{2}{5}}\)
2. a) \(\sqrt{64}-\sqrt{16}+\sqrt{\left(-3^2\right)}\) b) \(\sqrt{121}+\sqrt{\left(-5\right)^2}-\sqrt{9}\)
c) \(\sqrt{\frac{9}{4}}-\sqrt{\frac{16}{36}}-\sqrt{49}\) d) \(\sqrt{\left(-4\right)^2}+\sqrt{\left(-5\right)^2}-\sqrt{\left(-6\right)^2}\)
Tính
a) \(2\sqrt{\frac{25}{16}}-3\sqrt{\frac{49}{36}}+4\sqrt{\frac{81}{64}}\)
b) \(\left(3\sqrt{2}\right)^2-\left(4\sqrt{\frac{1}{2}}\right)^2+\frac{1}{16}.\left(\sqrt{\frac{3}{4}}\right)^2\)
c) \(\frac{2}{3}\sqrt{\frac{81}{16}}-\frac{3}{4}\sqrt{\frac{64}{9}}+\frac{7}{5}.\sqrt{\frac{25}{196}}\)
Giúp mik với
Tính
a)\(\frac{2}{3}\sqrt{81}-\left(\frac{-3}{4}\right).\sqrt{\frac{9}{64}}+\left(\frac{\sqrt{2}}{3}\right)^2\)
b)\(\left(-\sqrt{\frac{5}{4}}\right)^2-\sqrt{\frac{9}{4}}:\left(-4,5\right)-\sqrt{\frac{25}{16}}.\sqrt{\frac{64}{9}}\)
c)\(-2^4-\left(-2\right)^2:\left(-\sqrt{\frac{16}{121}}\right)-\left(-\sqrt{\frac{2}{3}}\right)^2:\left(-2\frac{2}{3}\right)\)
Bài1 Tính
\(\sqrt{36}\) \(\sqrt{49}\) \(-\sqrt{49}\) \(\sqrt{\left(-0,02\right)^2}\) \(\sqrt{0,04}\) \(\sqrt{2500}\)
\(\sqrt{72}\) \(\sqrt{12}\) \(\sqrt{8}\) \(\sqrt{27}\) \(\sqrt{63}\) \(\sqrt{28}\) \(\sqrt{54}\) \(\sqrt{48}\) \(\sqrt{24}\)
Bài2 Tìm căn bậc hai của các số sau
3600 4900 10000 0,0001
\(\frac{64}{9}\) \(\frac{81}{25}\) \(\frac{16}{81}\) \(\frac{64}{25}\) \(\frac{100}{36}\) \(\frac{0,64}{81}\) \(\frac{36}{25}\) \(\frac{49}{16}\) \(\frac{121}{25}\) \(\frac{169}{196}\)
Bài 3Tìm x , biết
\(a,4x^2-1=0\) \(b,2x^2+0,82=1\)
\(c,7-\sqrt{x=0}\) \(d,\frac{5}{12}\sqrt{x-\frac{1}{6}}=\frac{1}{3}\) \(e,\sqrt{x+1-2=0}\)
\(f,x^2=81\) \(g,x-2\sqrt{x=0}\) \(h,x=\sqrt{x}\)
So sánh các số x và y, nếu
a)\(x=\sqrt{961}-\left(\frac{1}{\sqrt{6}}-1\right)\)và \(y=\sqrt{1089}-\left(\frac{1}{\sqrt{7}}+1\right)\)
b) \(\sqrt{0,01}+\sqrt{0,04}+\sqrt{0,09}+\sqrt{0,16}+...+\sqrt{0,81}\)và \(y=\sqrt{20+0,25}\)
c) \(x=\left(1-\frac{1}{\sqrt{4}}\right).\left(1-\frac{1}{\sqrt{16}}\right).\left(1-\frac{1}{\sqrt{36}}\right).\left(1-\frac{1}{\sqrt{64}}\right).\left(1-\frac{1}{\sqrt{100}}\right)\)và\(y=\sqrt{0,1}\)
Tính giá trị của biểu thức sau:
a, \(\sqrt{0,09}+2.\sqrt{0,25}\)
b, \(0,5.\sqrt{100}-\sqrt{\frac{4}{25}}\)
c, \(\left(\sqrt{1\frac{9}{16}}-\sqrt{\frac{9}{16}}\right):5\)
d, 3. \(\sqrt{1\frac{17}{64}}-2.\sqrt{0,0625}\)