<=> 36 : \(\sqrt{324}-\sqrt{169}\)

<=> 36 : 18-13

<=> 2-13

=> -11

Bạn tự kết luận nhé !

a: \(=4\cdot5+14:7\)

=20+2

=22

Đáp án c​ủa câu 1 là -0.09, còn đáp án của câu 2 là 1

kq là 

Tính máy tính là ra

a) \(\sqrt{16}\cdot\sqrt{25}+\sqrt{196}:\sqrt{49}\)

\(=\sqrt{16\cdot25}+\sqrt{196:49}\)

\(=20+2=22\)

b) \(36:\sqrt{2\cdot3^2\cdot18}-\sqrt{169}\)

\(=36:\sqrt{324}-\sqrt{169}\)

\(=36:18-13=2-13=-11\)

c) \(\sqrt{\sqrt{81}}\)

\(=\sqrt{9}=3\)

d) \(\sqrt{3^2+4^2}\)

\(=\sqrt{9+16}=\sqrt{25}=5\)

a) \(\sqrt{16}.\sqrt{25}+\sqrt{196}\div\sqrt{49}\)

\(=4.5+14:7\)

\(=20+2=22\)

b) \(36:\sqrt{2.3^2.18}-\sqrt{169}\)

\(=36:18-13=-11\)

c) \(\sqrt{\sqrt{81}}=\sqrt{9}=3\)

d) \(\sqrt{3^2+4^2}=\sqrt{25}=5\)

a) \(\sqrt{16}\).\(\sqrt{25}\)+\(\sqrt{196}\):\(\sqrt{49}\)

=4.5+14/7

=20+2

=22

a) \(\sqrt{16}\).\(\sqrt{25}\) + \(\sqrt{196}\) : \(\sqrt{49}\) = 4.5+14:9=22

b) 36:\(\sqrt{2.3^2.18}\) - \(\sqrt{169}\)= 36 :  \(\)18 - 13 = -11

c) \(\sqrt{\sqrt{81}}\) = 3

d) \(\sqrt{3^2+4^2}\)= \(\sqrt{25}\)=5

a, 4.5+ 14:7= 20+2= 22

b, 36: √2.9.18 - 13 = 36:18 -13 =-11

c, √9 = 3

d, √9+16 = √25 = 5

Bài làm:

Bài 1:

a)\(\sqrt{16}.\sqrt{25}+\sqrt{196}:\sqrt{49}\)

= 4.5 + 14 : 7

= 20 + 2

= 22

b)\(36:\sqrt{2.3^2.18}-\sqrt{169}\)

= 36 : 18 - 14

= 2 - 14

= - 12

c)\(\sqrt{\sqrt{81}}\) = \(\sqrt{9}\) = 3

d)\(\sqrt{3^2+4^2}\)

= \(\sqrt{9+16}\)

= \(\sqrt{25}\)

= 5

a) \(\sqrt{16}.\sqrt{25}+\sqrt{196}:\sqrt{49}\)

\(=4.5+14:7\)

\(=20+2=22\)

b) \(36:\sqrt{2.3^2.18}-\sqrt{169}\)

\(=36:\sqrt{18^2}-13\)

\(=36:18-13\)

\(=2-13=-11\)

c) \(\sqrt{\sqrt{81}}\)                   d) \(\sqrt{3^2}+4^2\)

\(=\sqrt{\sqrt{9^{^2}}}\)                   \(=3+16\)

\(=\sqrt{9}\)                          \(=19\)

\(36:\sqrt{2.3^2.18-\sqrt{169}}\)

=\(36:\sqrt{2.9.18-13}\)

=\(36:\sqrt{324-13}\)

=\(36:\sqrt{311}\)

=\(\frac{36}{\sqrt{311}}\)

\(\approx2,042\)

(team 6->7 làm bài )