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126-[(63×2:6+109)×(75:25+21:3)]:10​

Răspuns :

126-[(63×2:6+109)×(75:25+21:3)]:10=

126-[(126:6+109)×(3+7)]:10=

126-[(21+109)×10]:10=

126-(130×10):10=

126-1300:10=

126-130=

-4

126 - [ ( 63 × 2 : 6 + 109 ) × ( 75 : 25 + 21 : 3 ) ] : 10 =

126 - [ ( 126 : 6 + 109 ) × ( 3 + 7 ) ] : 10 =

126 - [ ( 21 + 109 ) × 10 ] : 10 =

126 - ( 130 × 10 ) : 10 =

126 - 1300 : 10 =

126 - 130 = - 4