21°27''34''×3 109°11'4''÷7
问题描述：
21°27''34''×3 109°11'4''÷7
65°53''26''+37°14'53''
106°27''30''-98°25'42''
23°25'24''×7
102°48'21''÷3
已知∠A=143°26'29'',∠B=96°41'24'' (1)求∠A+2∠B (2)∠A-1/2∠B
153°19'42''+26°40'28''
90°3''-57°21'44''
33°15'16''×5
175°16'30''-47°30'÷6
答
21°27''34''×3 ＝63°81''102''＝63°82''42''＝64°22''42''109°11'4''÷7≈15°27'18''65°53''26''+37°14'53''＝（65+37）°+（53+14）'+（26+53）''＝（65+37）°+（53+14）'+1'+19''＝（65+37）°+1°+8'+1...