карточка помогите алгебра 48 баллов

1) (14/11 + 5/22) * 9/10 = (28/22 + 5/22) * 9/10 = 33/22 * 9/10 = 1 11/22 * 9/10 = 1 1/2 * 9/10 = 1.5 * 0.9 = 1.35

2) (17/10 - 1/20) * 2/15 = (34/20 - 1/20) * 2/15 = 33/20 * 2/15 = 33*2/20*15 = 11/50 = 22/100 = 0.22

3) 4 3/13 : (6/17 - 2 8/13) = 55/13 : (6/17 - 34/13) = 55/13 : (78/221 - 578/221) = - 55/13 : 500/221 = - 55*221/13*500 = - 187/100 = - 1.87

4) 4 3/4 : (1 1/15 + 3/5) = 19/4 : (16/15 + 9/15) = 19/4 : 25/15 = 19/4 : 5/3 = 19*3/4*5 = 57/20 = 285/100 = 2.85

5) (1/20 + 11/8) * 18/5 = (0.05 + 1.375) * 3.6 = 1.425 * 3.6 = 5.13

6) (8/19 - 17/38) * 19/5 = (16/38 - 17/38) * 19/5 = - 1/38 * 19/5 = - 1/10 = - 0.1

7) (1/13 - 2 3/4) * 26 = (1/13 - 11/4) * 26 = (4/52 - 143/52) * 26 = - 139/52 * 26/1 = - 139/2 = - 69.5

8) 1/2 + 16/5 = 5/10 + 32/10 = 37/10 = 3.7

9) 11/4 - 2/5 = 55/20 - 8/20 = 47/20 = 2 7/20 = 2 35/100 = 2.35

10) 9/4 + 8/5 = 45/20 + 32/20 = 77/20 = 3 17/20 = 3 85/100 = 3.85

11) 2/25 + 1/4 = 8/100 + 25/100 = 33/100 = 0.33