( 252 + 2.28 - 5.28 ) : 28
= ( 252 + 56 - 140 ) : 28
= ( 308 - 140 ) : 28
= 168 : 28
= 6
(252+2.28-5.28):28
=(28.9+2.28-5.28):28
=28(9+2-5):28
=9+2-5
=6
=(28.9+2.28-5.28):28
=(28.(9+2-5)):28
=(28.6):28
=28.6:28
=6
Xong
\(\left(252+2.28-5.28\right)\)\(:28\)
=\(\left(252+28.10\right)\)\(:28\)
=\(\left(252+280\right)\)\(:28\)
=\(532\)\(:28\)=\(19\)
(252 + 2.28 - 5.28) : 28
= (252 + 56 - 140) : 28
= (308 - 140) : 28
= 168 : 28
= 6
