Giải thích: \(\left(\sqrt{3}\right)^2=3\)
Ta có: \(\sqrt{3}\approx1,7\)
\(\left(\sqrt{3}\right)^2\approx1,7^2=2,89\)
\(=>\left(\sqrt{3}\right)^2=3\approx2,89\)
Giải thích: \(\left(\sqrt{3}\right)^2=3\)
Ta có: \(\sqrt{3}\approx1,7\)
\(\left(\sqrt{3}\right)^2\approx1,7^2=2,89\)
\(=>\left(\sqrt{3}\right)^2=3\approx2,89\)
Giải thích tại sao:
(
bài 1: tính
a) 3/4+(-5/2)+(-3/5)
b) \(\sqrt{\left(7\right)^2}+\sqrt{\dfrac{25}{16}-\dfrac{3}{2}}\)
c)\(\dfrac{1}{2}.\sqrt{100}-\sqrt{\dfrac{1}{16}+\left(\dfrac{1}{3}\right)^0}\)
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, \(\left|\dfrac{1}{4}-\sqrt{0,0144}\right|-\dfrac{3}{2}+\sqrt{\dfrac{81}{169}}\)
tính \(\sqrt{\left(3-\sqrt{5}\right)^2}\)
\(\sqrt{\left(\sqrt{3-\sqrt{4}}\right)^2}\)
\(\sqrt{\left(7-\sqrt{34}\right)^2}\) giúp mik nha
So sánh: căn bậc 2 của 3 cộng với căn bậc 2 của 14 và căn bậc 2 của 5 cộng với 4
Tính:
B=[-\(\sqrt{2,25}\)+4\(\sqrt{\left(-2,15\right)^2}\)-(3\(\sqrt{\dfrac{7}{6}}\))2].\(\sqrt{1\dfrac{9}{16}}\)
C=\(3\dfrac{1}{2}\).\(\dfrac{4}{49}\)-[2,(4).\(2\dfrac{5}{11}\)]:(\(\dfrac{-42}{5}\))
\(\sqrt{3^2+4^2-\sqrt{1^3+2^3+3^3}}\)
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,\(\frac{2^4.2^6}{\left(2^5\right)^2}-\frac{2^5.15^3}{6^3.10^2}\)
\(\left(\sqrt{\dfrac{1}{4}-1,2}\right):1\dfrac{1}{20}-\left(-\dfrac{5}{2}\right)^2+\left|1,25-\dfrac{3}{4}\right|\)