Ответ:
Пошаговое объяснение:
2)
(204,12 ÷ 40,5 - 3,2 × 1,2) × 6целых 1/2 + 7 ÷ 2целых 1/3 = 10,8
1) 204,12 ÷ 40,5 = 5,04
2) 3,2 × 1,2 = 3,84
3) 5,04 - 3,84 = 1,2
4) 1,2 × 6целых 1/2 = 6/5 × 13/2 = 3/5 × 13/1 = 39/5 = 7целых 4/5
5) 7 ÷ 2целых 1/3 = 7 ÷ 7/3 = 7 × 3/7 = 1 × 3/1 = 3
6) 7целых 4/5 + 3 = 10целых 4/5 = 10,8
3)
(1/14 - 2/7) ÷ (-3) - 6целых 1/13 = (1/14 - 4/14) ÷ (-3) - 6целых 1/13 = -3/14 × (-1/3) - 6целых 1/13 = 1/14 - 6целых 1/13 = 13/182 - 6целых 14/182 = - 6целых 1/182
4)
(7 - 8целых 4/5) × 2целых 7/9 - 15 ÷ (1/4 - 3/4) = -1целая 4/5 × 2целых 7/9 - 15 ÷ (-2/4) = -9/5 × 25/9 - 15 × (-2/1) = -5 - (-30) = -5+30 = 25
5)
(7 - 1целая 4/23 × 3целых 5/6 + 3целых 1/6 × 3/19) ÷ 2/3 - 2/3 = 3целых 5/6
1) 1целая 4/23 × 3целых 5/6 = 27/23 × 23/6 = 27/6
2) 3целых 1/6 × 3/19 = 19/6 × 3/19 = 1/2
3) 7 - 27/6 + 1/2 = 42/6 - 27/6 + 3/6 = 18/6 = 3
4) 3 ÷ 2/3 = 3 × 3/2 = 9/2 = 4целых 1/2
5) 4целых 1/2 - 2/3 = 4целых 3/6 - 4/6 = 3целых 9/6 - 4/6 = 3целых 5/6
6)
3/16 × 1целая 3/5 ÷ (7целых 1/2 × 1/10 - 3/5) - 3целых 1/2 ÷ 4целых 2/3 = 1целая 1/4
1) 3/16 × 1целая 3/5 = 3/16 × 8/5 = 3/2 × 1/5 = 3/10
2) 7целых 1/2 × 1/10 = 15/2 × 1/10 = 3/2 × 1/2 = 3/4
3) 3/4 - 3/5 = 15/20 - 12/20 = 3/20
4) 3/10 ÷ 3/20 = 3/10 × 20/3 = 1/1 × 2/1 = 2
5) 3целых 1/2 ÷ 4целых 2/3 = 7/2 ÷ 14/3 = 7/2 × 3/14 = 1/2 × 3/2 = 3/4
6) 2 - 3/4 = 1целая 4/4 - 3/4 = 1целая 1/4
