48°39′+77°31′=
计算:48°39′+67°31′=______.
计算:48°39′+67°31′-21°17′×5=______.
计算:(1)48°39′+67°31′(2)180°-21°17′×5
56°21′-36°30′ = 48°39′+36°30′=?
31°48′等于多少°
计算:(1)48°39′+67°31′(2)21°17′×4+176°52′÷3.
计算:48°39′+67°41′.
计算:48°39′+67°41′=______;90°-78°19′40″=______;21°17′×5=______
35°35′-25°45′=?180°-(48°39′40″+67°41′35″)=?
1、90°-54°48′36〃=() 2、52°35′-32°36′=()°()′ 3、18.5°+26°31′=()°
39°41′-24°45′=
帮解四道计算题48°39′+67°41′=_________;90°-78°19′40〃=___________;21°