Question

Wykonaj podane działania.
(3 1/2 + 2 4/7-5 3/7)*2 1/3
(4 1/6-1 2/3-2 1/18)*2 7/10
(1 3/5 + 2 2/7-3 19/35)*1 5/9
e) (2 3/5- 1 7/10-9/50)*1 7/8

daje naj !!!!
prosze o pelnie rozwiazanie duzo punktów !!!

Answer 1

(3 1/2 + 2 4/7 - 5 3/7)*2 1/3 = (3 2/14 + 2 8/14 - 5 6/14) *2 1/3 = 4/14 * 7/3 = 2/7 * 3/7 = 2/3
(4 1/6 - 1 2/3 - 2 1/18) * 2 7/10 = (4 3/18 - 1 12/18 - 2 1/18) * 2 1/10 = 8/18 * 21/10 = 4/6 * 7/5 = 28/30 = 14/15
(1 3/5 + 2 2/7 - 3 19/35) * 1 5/9 = (1 21/35 + 2 10/35 - 3 19/35) * 1 5/9 = (3 31/35 - 3 19/35) * 1 5/9 = 12/35 * 14/9 = 4/35 * 14/3 = 56/105
(2 3/5 - 1 7/10 - 9/50) * 1 7/8 = 36/50 * 15/8 = 9/10 * 3/2 = 27/20

Answer 2

A) 
(3 1/2+2 4/7-5 3/7)*2 1/3 = 
 (7/2+18/7-38/7)*7/3=
(7/2-20/7)*7/3=
(49/14-40/14)*7/3=
9/14*7/3=3/2=1,5
b)
(4 1/6-1 2/3-2 1/18)*2 7/10=
(25/6-5/3-37/18)*27/10=
(75/18-30/18-37/18)*27/10=
8/18*27/10=6/5=1,2
c) 
(1 3/5+2 2/7-3 19/35)*1 5/9=
(8/5+16/7-124/35)*14/9=
(56/35+80/35-124/35)*14/9=
12/35*14/9=8/15
d)
(2 3/5-1 7/10-9/50)*1 7/8=
(13/5-17/10-9/50)*15/8=
(130/50-85/50-9/50)*15/8=
36/50*15/8=18/20=0,9