Simplify this expression: $[(12-:4 + 9-:1 + 15:5) · 2 – (1+1+8+16+1)] -: 3$ ?

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Answer 1 · 2016-05-03T17:31:43

$[(12-:4+9-:1+15-:5)*2-(1+1+8+16+1)]-:3=1$

$[(12-:4+9-:1+15-:5)*2-(1+1+8+16+1)]-:3$

= $[(3+9+3)*2-(27)]-:3$

= $[15*2-27]-:3$

= $[30-27]-:3$

= $3-:3$

= $1$

Simplify this expression: [(12-:4 + 9-:1 + 15:5) · 2 – (1+1+8+16+1)] -: 3 [(12-:4 + 9-:1 + 15:5) · 2 – (1+1+8+16+1)] -: 3 ?