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The math problem about angle in the seventh grade last semester.
1)360 degrees /7 = 5 1 25' 44 "(the remaining 2" is ignored).

2)4 1/4 1 degree = 415' (0 ")

3)4 degrees 9' 36 "= 4 4/25 degrees.

4)25 degrees 12' 15 "times 3= 12 and 49/80 degrees.

5)47 degrees 16' 15"+22 degrees 43'45"-50 degrees12' 48 "=19 47'12"

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