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[55×5-(199-99×2+20×5)+220÷10]÷4

Răspuns :

[55*5-(199-99*2+20*5)+22]:4= 49

[275 - (199-198+100)+22]:4=49

[275 - 101+22] :4 =49

196:4=49



[275-(199-198+100)+22]÷4=
[275-101+22]÷4=
196÷4=49