Question

26. Выполните действия:
3) 12:
3
1) 1+1,8
8
2) (6-41%): 2,2;
15
3) (1,25+)-2,4;
6
4)
:7
1) (5,4-2²): 7²/3;
5) (23+0,25)-0,12;
3
6) (7,6-42): 19
1,9. помогите

Answer 1

Ответ:

Пошаговое объяснение:

1) (1 3/5 + 1,8) * 1/2 = ( 1,6 + 1,8) * 0,5 = 3 * 0,5 = 1,5

2) (6 - 4 8/15) : 2,2 = (5 15/15 - 4 8/15) : 2 1/5 = 1 7/15 : 2 1/5 = 22/15 : 11/5 =

= 22/15 * 5/11 = 2/3

3) (1,25 + 1/6) * 2,4 = (1 1/4 + 1/6) * 2 2/5 = (1 3/12 + 2/12) * 12/5 = 1 5/12 * 12/5 = 17/12 * 12/5= 17/5 = 3 2/5 = 3,4

4) ( 5,4 - 2 1/3) : 7 2/3 = ( 5 2/5 - 2 1/3) : 23/3 = (5 6/15 - 2 5/15) : 23/3 =

= 3 1/15 : 23/3 = 46/15 * 3/23 = 2/5 = 0,4

5)(2 1/3 + 0,25) * 0,12 = (2 1/3 + 1/4) * 12/100 = (2 4/12 + 3/12) * 3/25 =

= 2 7/12 * 3/25 = 31/12 * 3/25 = 31/100 = 0,31

6)(7,6 - 4 3/4) : 1,9 = (7,6 - 4,75) : 1,9 = 2,85 : 1,9 = 1,5