Lời giải:
$=204:[80-(35-23)]+1=204:68+1=3+1=4$
d) 204:{80-[70:2-(23 +3.5)]} + 20230
= 204 :{ 80 -[ 70 : 2 - ( 8 + 3 . 5)]} + 1
= 204 :{ 80 -[ 70 : 2 - ( 8 + 15)]} + 1
=204 :{ 80 -[ 70 : 2 -23]} + 1
=204 :{ 80 -[ 35 - 23]} + 1
= 204 :{ 80 -12} + 1
= 204 : 68 + 1
= 3 + 1
= 5