Question

77°24′+34°40′=？；108°18′-56°21′=？；15°36′18″×2=？；109°23′18″÷3=？求答案和过程

Answer 1

77°24′+34°40′=112°04‘
108°18′-56°21′=51°57
15°36′18″×2=31°2’36”
109°23′18″÷3=36°27‘46“

追问

过程~~

追答

77°24′+34°40′
=77°+34°+24‘+40’
=111°+64‘
=11°+1°4’
=112°4‘

108°18′-56°21′
=107°+1°18‘-56°-21’
=51°+78‘-21’
=51°+57‘
=51°57’

15°36′18″×2
=15°×2+36‘×2+18“×2
=30°+72’+36”
=30°+1°12‘+36“
=31°2’36”

109°23′18″÷3
=108°÷3+1°23’18”÷3
=36°+81‘÷3+138”÷3
=36°+27‘+46“
=36°27‘46“