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utilizeaza proprietatilor si calculeaza cit mai simplu
42,7×4,7+57,3×4,7=

16,2×35-16,2×34,9=




Răspuns :

42,7x4,7+57,3x4,7=4,7(42,7+57,3)=4,7x100=470

16,2x35-16,2x34,9= 16,2(35-34,9)=16,2 x 0,1=1,62