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rezolva si verifica prin proba:67-30=;48-45=;99-4=​

Răspuns :

67-30=37

V: 37+30=67

48-45=3

V:3+45=48

99-4=95

V:95+4=99

67-30=37

P: 30+47=67

48-45=3

P: 45+3

99-4=95

P: 95+4=99

Si daca vrei totalul:

37+3+95=135