Ответы
Пошаговое объяснение:
А
1) 1 1/2 + 2 2/3 = 1 3/6 + 2 4/6 = 3 7/6 = 4 1/6
2) (2 1/2)² : 4 1/6 = (5/2)² : 25/6 = 25/4 * 6/25 = 1/2 * 3/1 = 3/2 = 1 1/2
3) 1 1/2 + 38 1/2 = 39 2/2 = 40
Б
1) 7 2/3 - 6 3/4 = 7 8/12 - 6 9/12 = 6 20/12 - 6 9/12 = 11/12
2) 11/12 * 24/25 = 11/1 * 2/25 = 22/25
3) 22/25 + 3,12 = 0,88 + 3,12 = 4
Ответ:
Пошаговое объяснение:
а)
(2 1/2)² : (1 1/2 + 2 2/3) + 38 1/2 = 40
1) (2 1/2)² = 2 1/2 * 2 1/2 = 5/2 * 5/2 = 25/4
2) 1 1/2 + 2 2/3 = 1 3/6 + 2 4/6 = 3 7/6 = 4 1/6
3)25/4 : 4 1/6 = 25/4 : 25/6 = 25/4 * 6/25 = 3/2 = 1 1/2
4) 1 1/2 + 38 1/2 = 40
б)
(7 2/3 - 6 3/4 ) * 24/25 + 3,12 = 4
1) 7 2/3 - 6 3/4 = 7 8/12 - 6 9/12 = 6 20/12 - 6 9/12 = 11/12
2) 11/12 * 24/25 = 11 * 2/25 = 22/25
3) 22/25 + 3,12 = 22/25 + 312/100 = 88/100 + 312/100 = 400/100 = 4