2 1/3+4 1/10:(2 7/15-5/12)•5/6=1)2 7/15-5/12=
37/15-5/12=148/60-25/60=123/60; ////
2)41/10*60/123=6/3=2; ///3)2/1*5/6=5/3; ///4)7/3+5/3=12/3=4;
Ответ: 4
6. 1
--- = ---
12. 2
4. 1
--- = --
12. 3
4,8,12,16,20,24,28,32,36,40
20 * 50 * (90 - 70 + 20) + 8 * (34 - 8) = 40208
1) 90 - 70 = 20
2) 20 + 20 = 40
3) 34 - 8 = 26
4) 20 * 50 = 1000
5) 1000 * 40 = 40000
6) 8 * 26 = 208
7) 40000 + 208 = 40208
Я думаю что 7 + корень из 10