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Va rog jutatima repede : rezolva in 2 moduri : a. 7x (123234+2372)=

b.21x47+1532x21-21x12=



multumesc




Răspuns :

7x123234+7x2372=862638+16604=879242
7x(123234+2372)=879242

21x47+1532x21-21x12=987+32172-252=32907
21(47+1532-21)=32907