287. 1) 1:88-27-31/0
49
51
9
2) 3-
4
3)
3
10
-
-¹4)
3-11-12:3
5
13
1-
15
18.
2
3
+2 ²/3;
8 2 1 AUTO E
3a 3 HAR
:
+ :
45 15
*22
3
:1
+
Задание 287
Ответы
Пошаговое объяснение:
№287
1.
1) 49/51 : 3 8/9 = 49/51 : 35/9 = 49/51 * 9/35 = 7/17 * 3/5 = 21/85
2) 21/85 * 17/21= 1/5 * 1/1 = 1/5
3) 3 1/3 : 16 2/3 = 10/3 : 50/3 = 10/3 * 3/50 = 1/1 * 1/5 = 1/5
4) 1/5 - 1/5 = 0
5) 0 + 2 1/3 = 2 1/3
2.
1) 1 13/15 * 1 1/4 = 28/15 * 5/4 = 7/3 * 1/1 = 7/3 = 2 1/3
2) 3 1/4 - 2 1/3 = 3 3/12 - 2 4/12 = 2 15/12 - 2 4/12 = 11/12
3) 11/12 * 2 2/5 = 11/12 * 12/5 = 11/1 * 1/5 = 11/5 = 2 1/5
4) 8/15 : 2/3 = 8/15 * 3/2 = 4/5 * 1/1 = 4/5
5) 2 1/5 + 4/5 = 2 5/5 = 3
6) 3 - 1/3 = 2 3/3 - 1/3 = 2 2/3
3.
1) 18 * 1 1/3 = 18 * 4/3 = 6 * 4/1 = 24/1 = 24
2) 12 : 3/5 = 12 * 5/3 = 4 * 5/1 = 20/1 = 20
3) 24 - 20 = 4
4) 3/10 * 4 = 12/10 = 6/5
5) 6/5 : 1 3/5 = 6/5 : 8/5 = 6/5 * 5/8 = 3/1 * 1/4 = 3/4
6) 3/4 + 3/8 = 6/8 + 3/8 = 9/8 = 1 1/8
Ответ:
смотри на фото
Пошаговое объяснение:
...........
