第36页

信息发布者:
3
5的算术平方根
4
3
5
解:
(1)因为$11^2=121,$$120<121,$所以$\sqrt{120}<11;$
(2)因为$1.5^2=2.25,$$2.25<3,$所以$1.5<\sqrt{3};$
(3)因为$(\sqrt{12})^2=12,$$3.5^2=12.25,$$12<12.25,$所以$\sqrt{12}<3.5$
5
4
$\frac{11}{12}$
1或0
0


1
解:​$\sqrt {144}$​
​$=\sqrt {(12)^2}$​
​$=12$​
解:​$\sqrt {1}$​
​$=1$​
解:​$\sqrt {\frac {16}{25}}$​
​$=\sqrt {(\frac {4}{5})^2}$​
​$=\frac {4}{5}$​
解:​$\sqrt {0.0081}$​
​$=\sqrt {(0.09^2)}$​
​$=0.09$​
解:​$\sqrt {(-3)^2}$​
​$=\sqrt {9}$​
​$= 3$​