Question

120-40:8×[424:4-111:3+(256+46:2):3]:10

Answer 1

120-40:8x[424:4-111:3+(256+46:2):3]:10=
=120-5x[106-37+279:3]10=
=120-5x[69+93]:10=
=120-5x162;10=
=120-810:10=
=120-81=39

Answer 2

120 - 40 : 8 × [ 424 : 4 - 111 : 3 + ( 256 + 46 : 2 ) : 3 ] : 10 =
= 120 - 5 x [ 106 - 37 + ( 256 + 23 ) : 3 ] : 10
= 120 - 5 x ( 106 - 37 + 279 : 3 ) : 10
= 120 - 5 x ( 106 - 37 + 93 ) : 10
= 120 - 5 x 162 : 10
= 120 - 81
= 39

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