Răspuns :

42+9=51
9+42=51
51-9=42
51-42=9

29+5=34
5+29=34
34-29=5
34-5=29

83-45=38
83-38=45
38+45=83
45+38=83

36+43=79
43+36=79
79-36=43
79-43=36

98-75=23
98-23=75
23+75=98
75+23=98

53-6=47
53-47=6
47+6=53
6+47=53

36+38=74
38+36=74
74-36=38
74-38=36

62-17=45
62-45=17
17+45=62
45+17=62

sper ca e totul corect!