1.1°=60′,1′=60″
2.举例说明:
例1:填空(1)34.5°= ( )°()′
(2)112.27°=()°()′()″
解:解:(1)34.5°=34°+0.5°=34°+0.5×60″=34°+30′=34°30′
(2)112.27°=112°+0.27×60′=112°+16.2′=112°+16′+0.2×60″=112°16′12″
例2,把下列结果化程度
(1)72°36′ (2)37°14′24″
解:(1)72°36′
=72°+36′
=72°+(36÷60)°
=72°+0.6°
=72.6°
(2)37°14′24″
=37°+14′+24″
=37°+14′+(24÷60)′
=37°+14′+0.4′
=37°+14.4′
=37°+(14.4′÷60)°
=37°+0.24°
37.24°