Violympic toán 7
Các câu hỏi tương tự
thực hiện phép tính hợp lí
a, \(5\frac{3}{7}+\frac{7}{29}-0,7-\frac{3}{17}+\frac{22}{19}-2,3\)
b, \(0,375.\left(-1,5\right).\left(-4\right)^2\)
c, \(1\frac{1}{14}-\frac{7}{2}+2\frac{1}{14}:\left(\frac{-7}{2}\right)\)
d, \(\sqrt{0.36}-\sqrt{0,81}+\sqrt{0,49}\)
tính:\(\dfrac{\sqrt{3^2+39^2}}{\sqrt{7^2}+\sqrt{91^2}}\)
tính:\(\dfrac{\sqrt{3^2+39^2}}{\sqrt{7^2}+\sqrt{91^2}}\)=
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) \(\dfrac{2}{3}\sqrt{\dfrac{81}{16}}-\dfrac{3}{4}\sqrt{\dfrac{64}{9}}+\dfrac{7}{5}.\sqrt{\dfrac{25}{196}}\)
tính:
\(\dfrac{\sqrt{3^2+39^2}}{\sqrt{7^2}+\sqrt{91^2}}\)
TÍNH:
\(\dfrac{\sqrt{3^2+39^2}}{\sqrt{7^2+\sqrt{91^2}}}\)
tính nhanh
B=\(\frac{\left(\frac{1}{4}-\frac{\sqrt{2}}{7}+\frac{3\sqrt{2}}{35}\right)\left(\frac{-4}{15}\right)}{\left(\frac{1}{10}+\frac{3\sqrt{2}}{35}-\frac{\sqrt{2}}{5}\right)\frac{5}{7}}\)
Đơn giản các biểu thức sau :
a, \(\sqrt{8+2\sqrt{7}}\)
b, \(\sqrt{7+2\sqrt{10}}\)
c , \(\sqrt{8-2\sqrt{15}}\)
d, \(\sqrt{19-4\sqrt{21}}\)
so sánh
a, \(\sqrt{2}+\sqrt{3}+\sqrt{5}v\text{à}18\)
b, \(\sqrt{5}+\sqrt{7}+4v\text{à}12\)