数学题：37°18'+62°56' 179°-72°18'54'' 31°16'×5 15°20'÷5 要过程

37°18'+62°56'
=99°74′
=100°14′
179°-72°18'54''
=178°59′60″-72°18′54″
=106°41′6″
31°16'×5
=155°90′
=156°30′
15°20'÷5
=3°4′

37°18'+62°56'
=99°74'
=100°14'
179°-72°18'54''
=179°60'-72°18'54''
=179°59'60''-72°18'54''
=107°41'6''
31°16'×5
=105°80'
=106°20'
15°20'÷5=3°4'

37°18'+62°56'
=99°74′
=100°14′

179°-72°18'54''
=178°59′60″-72°18′54″
=106°41′6″

31°16'×5
=155°90′
=156°30′

15°20'÷5
=3°4′

37°18'+62°56'
=99°74'
=10°14'

179°-72°18'54''
=178°89'90''-72°18'54''
=106°71'36''

31°16'×5
=155°80'
=156°20'

15°20'÷5
=3°4'

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