计算 (1)83°46′+6°23′ (2)51°37′-32°45′31″ (3) 63.7°-(18°32′+11°28′) 要过

问题描述:

计算 (1)83°46′+6°23′ (2)51°37′-32°45′31″ (3) 63.7°-(18°32′+11°28′) 要过

(1)83°46′+6°23′
=89°69′
=90°9′
(2)51°37′-32°45′31″
=50°97′-32°45′31″
=50°96′60″-32°45′31″
=18°51′29″
(3) 63.7°-(18°32′+11°28′)
= 63.7°-29°60′
=63.7°-30°
=33.7°