Ask the famous school classroom mathematics sixth grade mid-term examination paper and answer! ! !
Two. √×××××√ Three. AACAA IV。 1 √ 16, 1.6; 12.4 \ 7,1\ 9,0,8 \ 3,3, 5,1:10000; (sketch) 6, 720 square meters; 5 hours; 153.86 m2, 188.4 m3; 54 pieces; 29 tons; 5 kg