Question

3. Решите примеры по формуле: a-b-c=a- (b + c). 31-12-15 91-45-12 49-26-7 34-7-11 64-18-21 71-23-12​

Answer 1

1. 31 - 12 - 15 = 31 - (12 + 15) = 31 - 27 = 4
2. 91 - 45 - 12 = 91 - (45 + 12) = 91 - 57 = 34
3. 49 - 26 - 7 = 49 - (26 + 7) = 49 - 33 = 16
4. 34 - 7 - 11 = 34 - (7 + 11) = 34 - 18 = 16
5. 64 - 18 - 21 = 64 - (18 + 21) = 64 - 39 = 25
6. 71 - 23 - 12 = 71 - (23 + 12) = 71 - 35 = 36

Answer 2

Я могу помочь вам решить примеры по формуле: a-b-c=a-(b+c). Вот решения:

- 31-12-15 = 31-(12+15) = 31-27 = 4 - 91-45-12 = 91-(45+12) = 91-57 = 34 - 49-26-7 = 49-(26+7) = 49-33 = 16 - 34-7-11 = 34-(7+11) = 34-18 = 16 - 64-18-21 = 64-(18+21) = 64-39 = 25 - 71-23-12 = 71-(23+12) = 71-35 = 36