5. 1) Найди сумму: 236 + 189 + 308. 2) (200-30)・5 300 + 90:3 50.4+90・3 70.3+80:10 27: (9.3) 68:2:2

Решение:

1. Найдем сумму: $$236 + 189 + 308 = 733$$.
2. $$(200 - 30) cdot 5 = 170 cdot 5 = 850$$
3. $$300 + 90 : 3 = 300 + 30 = 330$$
4. $$50 cdot 4 + 90 cdot 3 = 200 + 270 = 470$$
5. $$70 cdot 3 + 80 : 10 = 210 + 8 = 218$$
6. $$27 : (9 cdot 3) = 27 : 27 = 1$$
7. $$68 : 2 : 2 = 34 : 2 = 17$$