Question

[nguyen huu bac]

16 + (-6) + (-8) + 7 = ? 

(-8 ) - [ ( 2015 ⁰ ) -14 + 7 ] = ?

(-31 ) - [ 82 - ( - 17 ) ] = ? 

6 . ( - 2 ) ³ + 5 . ( - 4 ) - ( - 12 ) = ?

giải nhanh giúp mình nha mình cảm ơn nhiều

Answer 1

[Yen Nhi]

\(16+\left(-6\right)+\left(-8\right)+7\)\(=16-6-8+7\)\(=\left(16-6\right)-\left(8-7\right)\)\(=10-1=9\)

\(\left(-8\right)-[\left(2015^0\right)-14+7]\)\(=-8-\left(1-14+7\right)\)\(=-8-\left(-6\right)=-2\)

\(\left(-31\right)-[82-\left(-17\right)]\)\(=-31-\left(82+17\right)\)\(=-31-99=-130\)

\(6\left(-2\right)^3+5\left(-4\right)-\left(-12\right)\)\(=6\left(-8\right)+\left(-20\right)+12\)\(=-48-20+12=-56\)