25 + 12 + 6 + 8 + ((2 * (15 + 9 + 7)) - 100 + 29) =

Sagot :

25 + 12 + 6 + 8 + ((2 * (15 + 9 + 7)) - 100 + 29)
= 25 + 12 + 6 + 8 + (( 2*15 + 2*9 + 2*7) -100 + 29)
= 25 + 12 + 6 + 8 + ( 30 + 18 + 14 - 100 + 29)
= 25 + 12 + 6 + 8 + (-9)
= 51 - 9
= 42

voilà
25 + 12 + 6 + 8 + ( ( 2 * ( 15 + 9 + 7 ) ) - 100 + 29 )
= 37 + 14 + ( ( 2 * ( 24 + 7 ) ) -71 )
= 51 + ( ( 2 * 31 ) ) -71 )
= 51 + ( 62 - 71 )
= 51 - 9
= 42