Răspunsuri

2014-10-27T21:42:32+02:00
42 : { 3+2 x[1+4 x ( 17 - 15)]} =
42: [ 3+2 x( 1+4 x2 )]=
42 : ( 3+2 x 9) =
42 : (3+18 )=
42 : 21 = 2

2014-10-27T21:50:38+02:00
42÷{3+2×[1+4×(17-15)]}=42÷[3+2×(1+4×2)]= 42÷[3+2×(1+8)]=42÷(3+2×9)=42÷(3+18)=42÷21=2