Question

efectuati: 2•{30-[117+(202-28•7)•18]:9}


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Answer 1

2*{30-[117+(202-28*7)*18]:9}=

2*{30-[117+(202-196)*18]:9}=

2*[30-(117+6*18):9]=

2*[30-(117+108):9]=

2*(30-225:9)=2*(30-25)=2*5=10

Answer 2

2 x { 30 - [ 117 + ( 202 - 28 x 7 ) x 18 ] : 9}= 10

= 2 x { 30 - [ 117 + ( 202 - 196 ) x 18 ] : 9 } =

= 2 x [ 30 - ( 117 + 6 x 18 ) : 9 ] =

= 2 x [ 30 - ( 117 + 108 ) : 9 ]

= 2 x ( 30 - 225 : 9 ) =

2 x ( 30 - 25 ) =

= 2 x 5 =

= 10