Đáp án + Giải thích các bước giải:
a, $177:[2.(4²-9)+3².(15-10)]$
$=177:[2.(4²-9)+3². 5]$
$=177:[2.(16-9)+9.5]$
$=177:[2.(16-9)+45]$
$=177:[2.7+45]$
$=177:59$
$=3$
b, $[(25-2².3)+(3².4+16)]:5$
$=[(25-4.3)+(9.4+16)]:5$
$=[13+52]:5$
$=65:5$
$=13$
c, $125.(28+72)-25.(3².4+64)$
$=125.(28+72)-25.(9.4+64)$
$=125.100-25.100$
$=100.(125-25)$
$=100.100$
$=10 000$
d, $295.(31-2².5)²$
$=295.11²$
$=35 695$
