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
Ответ : 16 см периметр прямоугольника.
Решение в приложении.
1)3/22*11/5=3/55
2)8/11+3/55=43/55
1)2.4<2.5
2)13.13>13.12
3)8.7<9.7
4)16.375 >16.374
5) 100.05> 99.05
6)81.09 <81.9
7)0.4253> 0.4235
8)46.4646< 46.4664