Решите примеры
1. −5 ⋅ (−3) : 20 ⋅ (−0,2)
2. -1 4/7 : (-1)
3. −15,3 −7,26 : −2 ⋅ (−1)
4. 10 ⋅ 17−10 ⋅ 6 : 11 ⋅ 40
5. 3/7 ⋅ 1,3 ⋅ 1 1/5 : 0,8 : 1/5
Дам сорок баллов!