Пошаговое объяснение:
4.
1) 35/64 : 2,5 =
35/64 : 2. 5/10 =
35/64 : 25/10 = 35/64 * 10/25 = 7/32 * 5/5 =
7/32 * 1 = 7/32
2) 2. 3/16 : 7/32 =
35/16 : 7/32 = 35/16 * 32/7 = 5/1 * 2/1 = 10/1 = 10
3) 16 : 32 = 16/32 = 1/2
4) 10 : 1/2 = 10 * 2/1 = 20/1 = 20
5) 1/11 * 0,825 =
1/11 * 825/1000 = 1/11 * 33/40 = 1/1 * 3/40 = 3/40
6) 20 * 3/40 = 60/40 =
3/2 = 1. 1/2
ответ: 1. 1/2
5.
1) 4,8 * 5/12 = 4. 8/10 * 5/12 = 48/10 * 5/12 = 4/2 * 1/1 = 4/2 = 2
2) 2 * 23/60 = 1 * 23/30 = 23/30
3) 23/30 : 2,3 = 23/30 :
2. 3/10 = 23/30 : 23/10 =
23/30 * 10/23 = 10/30 = 1/3
4) 1. 1/6 : 1/3 = 7/6 : 1/3 =
7/6 * 3/1 = 21/6 = 7/2 = 3,5
5) 21 : 3,5 = 6
6) 6 : 5 = 6/5 = 1. 1/5 или 1,2
ответ: 1. 1/5
3х+5х=1568-96
8х=1472
х=1472:8
х=184
3*184+5*184+96=1568
1568=1568
ответ:х=184
357z-149z-1843=11469
357z-149z=11469+1843
208z=13312
z=13312:208
z=64
357*64-149*64-1843=11469
11469=11469
ответ:z=64
2y+5y+78=1581
2y+5y=1581-78
7y=1503
y=1503:7
y=214.7
2*214.7+5*214.7+78=1581
1581=1581
ответ:y=214.7
256m-147m-1871=63747
256m-147m=63747+1871
109m=65618
m=65618:109
m=602
256*602-147*602-1871=63747
63747=63747
ответ:m=602