c ) 86 . 47 - 86 . 17 + 30 . 14
= 86 . ( 47 - 17 ) + 30 . 14
= 86 . 30 + 30 . 14
= 30 . ( 86 + 14 )
= 30 . 100
= 3000
a/ \(\left(-27\right)+|-227|+\left(-84\right).\)
\(=\left(-27\right)+227+\left(-84\right)\)
\(=200+\left(-84\right)=116\)
b/ \(=2017+\left(729+\left(-1008\right)\right)\)
\(=2017+\left(-279\right)=1738\)
c/ \(=86.\left(47-17\right)+30.14\)
\(=80.30+30.14\)
\(=30.\left(80+14\right)\)
\(=30.94=2820\)
Nhớ k cho mình nhé! Thank you!!!
a ) ( - 27 ) + I - 227 l + ( - 84 )
= ( - 27 ) + 227 + ( - 84 )
= 200 + ( - 84 )
= 116
