1 вариант:
5 + 8 = 13, 13 - 8 = 5, 13 - 5 = 8
7 + 8 = 15, 15 - 7 = 8, 15 - 8 = 7
2 вариант:
4 + 9 = 13, 13 - 4 = 9, 13 - 9 = 4
<span>6 + 9 = 15, 15 - 6 = 9, 15 -9 = 6
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Под а BO, OD, DA, AC ,BD, OA, CO. Под б FK, KM, KE, EN, NS, MN , KN, ES, PN, PK, PM.
Ответ:
(5/6-2/3)•(7/8-1/2)•(-4)=-1/4
Пошаговое объяснение:
(5/6-2/3)•(7/8-1/2)•(-4)=1/6•3/8•(-4)=-1/2•1/2=-1/4
1) 12/60 = 1/5 = 0,2.
2) 5/60 = 1/12 .
3) 90/60 = 3/2 = 1,5.
4) 135/60 = 27/12 = 9/4 = 2,25.
5) 96/60 = 16/10 = 1,6.
6) 230/60 = 23/6.