3.(8баллов).Вычислите:
а. 13-(5 7/12-1 4/15+3/4)=
b. 9 11/18-5 3/4+2 7/9-1 15/36
c. (6 1/4-4 1/8)•4+3 1/3:2 1/2
d. (19 2/5+28 9/40): 15 7/8+24 3/8
Помогите дам много баллов.
Это СОЧ за четверть!!!!Побыстрее умоляю.....
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