Ta có : \(5\sqrt{16}-4\sqrt{9}+\sqrt{25}\)-0,3\(\sqrt{400}\)
= 5.4 - 4.3 + 5 - 0,3.20
= 20-12+5-6
= 9
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Các câu hỏi tương tự
tinh: C=25.(\(\dfrac{-1}{3}\))\(^3\)+\(\dfrac{1}{5}\)-2.(\(\dfrac{-1}{2}\))\(^2\)-\(\dfrac{1}{2}\)
E=5\(\sqrt{16}\)-4\(\sqrt{9}\)+\(\sqrt{25}\)-0,3\(\sqrt{400}\)
\(\sqrt{1}\) - \(\sqrt{4}\) + \(\sqrt{9}\) - \(\sqrt{16}\)+ \(\sqrt{25}\)- \(\sqrt{36}\)+ ... - \(\sqrt{400}\)
Tính
a) \(2\sqrt{\dfrac{25}{16}}-3\sqrt{\dfrac{49}{36}}+4\sqrt{\dfrac{81}{64}}\)
b) \(\left(3\sqrt{2}\right)^2-\left(4\sqrt{\dfrac{1}{2}}\right)^2+\dfrac{1}{16}.\left(\sqrt{\dfrac{3}{4}}\right)^2\)
c) \(\dfrac{2}{3}\sqrt{\dfrac{81}{16}}-\dfrac{3}{4}\sqrt{\dfrac{64}{9}}+\dfrac{7}{5}.\sqrt{\dfrac{25}{196}}\)
1) \(\left(\dfrac{1}{3}\right)^{50}.90^{25}-\dfrac{2}{3}:4\)
2) \(10.\sqrt{0,01}.\sqrt{\dfrac{16}{9}}+\sqrt{49}-\dfrac{1}{6}.\sqrt{4}\)
1.thực hiện phép tính
a.(0,125).(-3.7).(-2)\(^3\)
b.\(\sqrt{36}.\sqrt{\frac{25}{16}}+\frac{1}{4}\)
c.\(\sqrt{\frac{4}{81}}:\sqrt{\frac{25}{81}}-1^2_5\)
d.\(0,1.\sqrt{225}.\sqrt{\frac{1}{4}}\)
1 tính
a, \(\sqrt{0,36}+\sqrt{0,49}\)
b, \(\sqrt{\frac{4}{9}}-\sqrt{\frac{25}{36}}\)
2 tìm x
a, \(x^2=81\)
b, \(\left(x-1\right)^2=\frac{9}{16}\)
c, \(x-2\sqrt{x}=0\)
d, \(x=\sqrt{x}\)
Bài 1 : Tính giá trị biểu thức :
1/ 0,2.sqrt{100} -sqrt{dfrac{16}{25}}
2/ dfrac{2^7.9^{3^{ }}}{6^5.8^2}
3/sqrt{0,01} - sqrt{0,25}
4/ 0,5 . sqrt{100} - sqrt{dfrac{1}{4}}
5/ 7. sqrt{0,01} + 2.sqrt{0,25}
6/ 0,5.sqrt{100} - sqrt{dfrac{1}{25}}
Đọc tiếp
Bài 1 : Tính giá trị biểu thức :
1/ 0,2.\(\sqrt{100}\) -\(\sqrt{\dfrac{16}{25}}\)
2/ \(\dfrac{2^7.9^{3^{ }}}{6^5.8^2}\)
3/\(\sqrt{0,01}\) - \(\sqrt{0,25}\)
4/ 0,5 . \(\sqrt{100}\) - \(\sqrt{\dfrac{1}{4}}\)
5/ 7. \(\sqrt{0,01}\) + 2.\(\sqrt{0,25}\)
6/ 0,5.\(\sqrt{100}\) - \(\sqrt{\dfrac{1}{25}}\)
Tìm x biết:
a) \(8\sqrt{x}-3\sqrt{\dfrac{4}{81}}=5,2\)
b) \(12-3x^2=10+\sqrt{\dfrac{25}{16}}\)
Thực hiện phép tính \(\dfrac{4^5.9^{4^{ }}-2.6^{9^{ }}}{2^{10^{ }}.3^{8^{ }}+6^{8^{ }}.20}:\sqrt{\dfrac{25}{9}}\)