Đáp án+Giải thích các bước giải:
`1, (5.2²-20):5+3².6`
`= (5.4-20):5+9.6`
`=(20-20):5+54`
`=0:5+54`
`=0+54`
`=54`
`2, 50:{420:[375-(150+5.3)]}`
`= 50:{420:[375-(150+15)]}`
`= 50:{420:[375-165]}`
`= 50:{420:210}`
`= 50:2`
`=25`
`3, [(3+3⁷:3⁷):10+97]`
`= (3+1):10+97`
`= 4:10+97`
`=4/10+97`
`=97 2/5`
`=487/4`
`4, 6²:{180:[95-(60-55²).3]}71²⁰¹⁷`
`= 36:{180:[95-(60-55^2)]}.71^2017`
`= 36:{180:[95-(60-3025)]}.71^2017`
`= 36:{180:[95-(-2965]}.71^2017`
`= 36:{180:[95+2965]}.71^2017`
`= 36:{180:3060}.71^2017`
`=36:180/3060.71^2017`
`= 36: 1/17. 71^2017`
`=36.17.71^2017`
`=612.71^2017`