Ответ:
Пошаговое объяснение:
№3
2,1(9) = 2. (19-1)/90 = 2. 18/90 = 2. 1/5.
2. 1/5 = 11/5 = 11 : 5 = 2,2
2,2 - конечная десятичная дробь
№4
0,(12) = (12-0)/99 = 12/99 = 4/33
0,(6) = (6-0)/9 = 6/9 = 2/3
1,(81) = 1. (81-0)/99 = 1. 81/99 = 1. 9/11
0,(12)/0,(6) + 1,(81) =
4/33 : 2/3 + 1. 9/11 = 4/33 * 3/2 + 1. 9/11 =
2/11 * 1/1 + 1. 9/11 = 2/11 + 1. 9/11 =
1. 11/11 = 2
Ответ: 2
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Verified answer
Ответ:
Пошаговое объяснение:
№3
2,1(9) = 2. (19-1)/90 = 2. 18/90 = 2. 1/5.
2. 1/5 = 11/5 = 11 : 5 = 2,2
2,2 - конечная десятичная дробь
№4
0,(12) = (12-0)/99 = 12/99 = 4/33
0,(6) = (6-0)/9 = 6/9 = 2/3
1,(81) = 1. (81-0)/99 = 1. 81/99 = 1. 9/11
0,(12)/0,(6) + 1,(81) =
4/33 : 2/3 + 1. 9/11 = 4/33 * 3/2 + 1. 9/11 =
2/11 * 1/1 + 1. 9/11 = 2/11 + 1. 9/11 =
1. 11/11 = 2
Ответ: 2