mk cần gấp mong các bạn giúp mk vs nhé
a.
=512-47-14+108+57-41
=(512+108)+(57-47)-(14+41)
=620+10-50
=560
\(a ) ( 512-47)-(14-108)-(-57+41)\)
\(= 512-47-14+108+57-41\)
\(= ( 512 + 108 ) - ( 47 + 14 - 57 ) - 41\)
\(= 620 - 4 - 41 \)
\(= 575\)
\(b ) -(-68+15+52)+(-41+27+13)\)
\(- (23-42+34)\)
\(= 1 - 1- 15 \)
\(= - 15\)