0.2. Выполните действия: 2 3 15 6 1 1) 2. 2 2) -1 - 5 4 19 + 20 + HⓇ 65 +4 2 3 3) 6 4) 9 - 3 · (−4) + 7 18 -8+24. 8) + -9; 3 -
1,2 решение
СРОЧНО НУЖНО ПОЖАЛУЙСТА УМАЛЯЮ
Ответы
Объяснение:
№1
1) 2/15 - 3 5/6 = 4/30 - 3 25/30 = -3 21/30 = -3 7/10
2) 2 1/2 * (-3 7/10) = 5/2 * (-37/10) = 1/2 * (-37/2) = -37/4 = -9 1/4
3) -9 1/4 + 1/4 = -9
№2
1) 4/5 + 19/20 = 16/20 + 19/20 = 35/20 = 7/4
2) 6 5/6 + 4 2/3 = 6 5/6 + 4 4/6 = 10 9/6 = 10 3/2 = 11 1/2
3) -1 1/7 * 7/4 = -8/7 * 7/4 = -2/1 * 1/1 = -2/1 = -2
4) -2 * 11 1/2 = -2 * 23/2 = -46/2 = -23
№3
1) 6 3/8 - 2 3/4 = 6 3/8 - 2 6/8 = 5 11/8 - 2 6/8 = 3 5/8
2) 3 5/8 * (-4) = 29/8 * (-4) = 29/2 * (-1) = -29/2 = -14 1/2
3) 7/18 * 9 = 7/2 * 1 = 7/2 = 3 1/2
4) -14 1/2 + 3 1/2 = -11
№4
1) 4 1/3 - 8 = 4 1/3 - 7 3/3 = -3 2/3
2) 9 1/6 : (-3 2/3) = 55/6 : (-11/3) = 55/6 * (-3/11) = 5/2 * (-1/1) = -5/2 = -2 1/2
3) 24 * 3/8 = 3 * 3/1 = 9/1 = 9
4) -2 1/2 + 9 = -2 1/2 + 8 2/2 = 6 1/2