Đáp án:
Giải thích các bước giải:
c, ${132-[116-(16-8)]:2}.5$
$ = {132-[116-16+8]:2}.5$
$={132-108:2}.5=$
$ ={132-54}.5=78.5=390$
d,$36:{336:[200-(12+8.20)]}$
$ =36:{336:[200-12-160]}$
$=36:{336:28}=36:12=3$
a,${145-[130-(246-236)]:2}.5$
$ ={145-[130-10]:2}.5$
$ ={145-120:2}.5$
$={145-60}.5=85.5=425$
b, $100:{250:[450-(4.5^3 -2^2.25)}]$
$ =100:{250:[450-4.5^2(5-1)]}$
$=100:{250:[450-4.5^2.4]}$
$=100:{250:[450-400]}$
$ =100:{250:50}=100:5=20$