100 и 6, 6 и 100, 200 и 3, 3 и 200, 100 и 6, 6 и 100.
10 4\11 ÷ 2 21\22 × 6 ÷ 1\2
1) 10 4/11 = 114/11;
21/22 = 65/22.
114/11 ÷ 65/22 = 114/11 × 22/65 = 114×22/11×65 = 114×2/65 = 228/65 = 3 33/65
2) 228/65 × 6 = 1.368/65 = 21 3/65
3) 1.368/65 ÷ 1/2 = 1.368/65 × 2 = 2.736/65 = 42 6/65
Х-стоит машинка
7х+100=9х-20
7х-9х=-20-100
-2х=-120
2х=120
х=120/2
х=60
1)961600:32=30050
2)92-74=18
3)18×6÷3=36
4)30050-36=30014
вроді так