Question

Se dau nr :a=[27×(258-256)×12-(569-461)]÷3+86,,b=139+[28×30÷4×(108÷3-7+4)].Care afirmație este adevărată? a <b ,a>b ,a=bine.

Answer 1

a=[27×(258-256)×12-(569-461)]÷3+86=
=(27×2×12-108)÷3+86=
=(648-108)÷3+86=
=540÷3+86=
=180+86=266

b=139+[28×30÷4×(108÷3-7+4)]=
=139+[210×(36-3)]=
=139+(210×33)=
=139+6930=7069

a<b