Question

26. Выполните действия: 4) (5,4-2): 7²/; 5)(21-0,25)-0,12; + 3 3 6) (7.6-4):1.9.​

Answer 1

1. (5,4 -2 1/3): 7 2/3
54 54/10 27/5
2 1/3 2.3+1/3 6+1/3 7/3
7 2/3 7.3+2/3 21+2/3 23/3
(27/5-2 1/3):7 2/7
27/5-7/3 81-35/15 46/15
46/15.3/23
2/15.3
=2/5

2. (2 1/3+0,25).0,12
2 1/3 2.3+1/3 6+1/3 7/3
0,25 25/100 1/4
0,12 12/100 3/25
(7/3+1+4).3/25
7/3+1/4 28+3/12 31/12
31/12.3/25
31/4.1/25
=31/100

3. (7,6-4 3/4):1,9
7,6 76/10 38/5
4 3/4 4.4+3/4 16+3/4 19/4
(38/5-19/4):19/10
38/5-19/4 162-95/20 57/20
57/20.10/19
3/20.10
=3/2