12 целых 2 / 15-(7 целых 11/15 + 2 целых 8/15 )

Решение на фото....................

2 1/6 + 2 5/12 = (2 + 2) + (2/12 + 5/12) = 4 7/12

9 3/8 + 7 5/6 = (9 + 7) + (9/24 + 20/24) = 16 + 29/24 = 17 5/24

5 1/10 + 8 3/8 = (5 + 8) + (4/40 + 15/40) = 13 19/40

6 2/15 + 42 18/25 = (6 + 42) + (10/75 + 54/75) = 48 64/75

5 3/18 + 18 1/27 = (5 + 18) + (9/54 + 2/54) = 23 11/54

9 3/20 + 7 4/15 = (9 + 7) + (9/60 + 16/60) = 16 25/60 = 16 5/12

2 19/44 + 5 52/66 = (2 + 5) + (57/132 + 104/132) = 7 161/132 = 8 29/132

38 21/26 + 14 34/39 = (38 + 14) + (63/78 + 68/78) = 52 131/68 = 53 63/68

6 11/12 + 3 15/16 = (6 + 3) + (44/48 + 45/48) = 9 89/48 = 10 41/48

ответ:Можно так:

1) 12,03<x<12,23, x=12,13

2) 12,03<x<12,33, x=12,13, x=12,23

3) 12,03<x<12,43, x=12,13, x=12,23, x=12,33

4) 12,03<x<12,53, x=12,13, x=12,23, x=12,33, x=12,43

5) 12,03<x<12,63, x=12,13, x=12,23, x=12,33, x=12,43, x=12,53

6) 12,03<x<12,73, x=12,13, x=12,23, x=12,33, x=12,43, x=12,53, x=12,63

7) 12,03<x<12,83, x=12,13, x=12,23, x=12,33, x=12,43, x=12,53, x=12,63, x=12,73

8) 12,03<x<12,93, x=12,13, x=12,23, x=12,33, x=12,43, x=12,53, x=12,63, x=12,73, x=12,83

9) 12,13<x<12,33, x=12,23

10) 12,13<x<12,43, x=12,23, x=12,33

11) 12,13<x<12,53, x=12,23, x=12,33, x=12,43

12) 12,13<x<12,63, x=12,23, x=12,33, x=12,43, x=12,53

13) 12,13<x<12,73, x=12,23, x=12,33, x=12,43, x=12,53, x=12,63

14) 12,13<x<12,83, x=12,23, x=12,33, x=12,43, x=12,53, x=12,63, x=12,73

15) 12,13<x<12,93, x=12,23, x=12,33, x=12,43, x=12,53, x=12,63, x=12,73, x=12,83

16) 12,23<x<12,43, x=12,33

17) 12,23<x<12,53, x=12,33, x=12,43

18) 12,23<x<12,63, x=12,33, x=12,43, x=12,53

19) 12,23<x<12,73, x=12,33, x=12,43, x=12,53, x=12,63

20) 12,23<x<12,83, x=12,33, x=12,43, x=12,53, x=12,63, x=12,73

21) 12,23<x<12,93, x=12,33, x=12,43, x=12,53, x=12,63, x=12,73, x=12,83

22) 12,33<x<12,53, x=12,43

23) 12,33<x<12,63, x=12,43, x=12,53

24) 12,33<x<12,73, x=12,43, x=12,53, x=12,63

25) 12,33<x<12,83, x=12,43, x=12,53, x=12,63, x=12,73

26) 12,33<x<12,93, x=12,43, x=12,53, x=12,63, x=12,73, x=12,83

27) 12,43<x<12,63, x=12,53

28) 12,43<x<12,73, x=12,53, x=12,63

29) 12,43<x<12,83, x=12,53, x=12,63, x=12,73

30) 12,43<x<12,93, x=12,53, x=12,63, x=12,73, x=12,83

31) 12,53<x<12,73, x=12,63, x=12,73, x=12,83

32) 12,53<x<12,83, x=12,63, x=12,73

33) 12,53<x<12,93, x=12,63, x=12,73, x=12,83

34) 12,63<x<12,83, x=12,73

35) 12,63<x<12,93, x=12,73, x=12,83

36) 12,73<x<12,93, x=12,83

Пошаговое объяснение: