我同意楼上观点,把它全化为度,但他约等于错了
50°24‘25“ =50 + 24/60 + 25/(60*60) =36293/720
98°12’25“ =98 + 12/60 + 25/3600=70709/720
所以50 + 24/60 + 25/(60*60) - (98 + 12/60 + 25/3600)/5=27689/900 =30°45 ’ 56 ‘’约等于30.766
七年级上册数学 角的比较和运算50°24‘25“-98°12’25“÷5
我同意楼上观点,把它全化为度,但他约等于错了
50°24‘25“ =50 + 24/60 + 25/(60*60) =36293/720
98°12’25“ =98 + 12/60 + 25/3600=70709/720
所以50 + 24/60 + 25/(60*60) - (98 + 12/60 + 25/3600)/5=27689/900 =30°45 ’ 56 ‘’约等于30.766