Поиощь 2 класс пж умоляю 30 бал и корона

Ответ:

Пошаговое объяснение:

1) 58 - d + 20

d =15

58 - 15 + 20 = 43 + 20 = 63

d = 10

58 - 10 + 20 = 48 + 20 = 68

d = 25

58 - 25 + 20 = 33 + 20 = 53

d = 8

58 - 8 + 20 = 50 + 20 = 70

d = 0

58 - 0 + 20 = 58 + 20 = 78

2) 60 + d - 28

d = 15

60 + 15 - 28 = 75 - 28 = 47

d = 10

60 + 10 - 28 = 70 - 28 = 42

d = 25

60 + 25 - 28 = 85 - 28 = 57

d = 8

60 + 8 - 28 = 68 - 28 = 40

d = 0

60 + 0 - 28 = 60 - 28 = 32

3) (30 + 12) - d

d = 15

(30 + 12) - 15 = 42 - 15 = 27

d = 10

(30 + 12) - 10 = 42 -10 = 32

d = 25

(30 + 12) - 25 = 42 - 25 = 17

d = 8

(30 + 12) - 8 = 42 - 8 = 34

d =0

(30 + 12) - 0 = 42 - 0 = 42