计算:56°18'32''+41°7'59''=________
计算:78°18′=________°,180°-35°19〃=________.
计算:①36°27′38〃+133°41′54〃=___________②100°-37°59′45〃=________
计算:(1)15°30′=________; (2)25.35°________; (3)6.75°=________;
17°14'24''=________度
计算:a分之2-a分之1=________.
37.51°等于_______°________′________″
计算:12-22+32-42+52-62+…+n2-(n+1)2=________.(n属于奇数)
25°36′=________° 27.3°=________° ________′ 270″=_______′=___
77°52′+32°43′-21°17′=________
利用乘法公式计算:98的平方=______=________=______
计算:(x-1)方分之3-(x-1)方分之3x=________.
计算:(b²/a)^-2=________ 计算:1÷(1/R1+1/R2)=____