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[(248-1×1)÷10]+(500÷50+800÷20)

Răspuns :

24.7+(10+40)=24.7+50=74.7
[(248-1×1)÷10]+(500÷50+800÷20) =[(248-1)÷10]+(10+40) =(247÷10)+50=

=24,7+50=74, 7