4 1/8 - 2 5/16 = 33/8 - 37/16 = 66-37 / 16 = 29/16 * - 1 3/29 = 29/16 * - 32/29 = 32/16 = - 2
8 1/3 - 10 1/2 = 25/3 - 21/2 = 50-63 /6 = - 13/6 * 12 /65 = - 156/390 = - 2/5
Ответ:х=13.195
Пошаговое объяснение:
(13.9+259.1)*0.85-10х=100.1
273*0.85-10х=100.1
232.05-10х=100.1
-10х=-139.95
х=13.195
6,452*..=64,52
64,52:6,452=10
6,452*10=64,52
(87 - 2) : 5 = 17
87 : 17 = 5 (ост. 2)
19 * 3 + 4 = 61
61 : 19 = 3 (ост. 4)
(99 - 9) : 2 = 45
99 : 45 = 2 (ост. 9)
(49 - 4) : 15 = 3
49 : 3 = 15 (ост. 4)
8 * 12 + 7 = 103
103 : 8 = 12 (ост. 7)
72:12=6(лет)-внуку
Ответ:Внуку 6 лет.