Lời giải đây nha

@haiyen5avy

#Hoidap247

Đáp án:

Giải thích các bước giải:

 a) 5.$2^{2}$ -18:$3^{2}$ =5.4-18:9=20-2=18

b) 4.$3^{2}$- $3^{7}$: $3^{4}$ =4.9-$3^{3}$=36-27=9 

c) $2^{3}$.17- $2^{3}$.14= $2^{3}$.(17-14)= $2^{3}$.3=8.3=24 

d) $3^{3}$.76- $3^{3}$.12+ $3^{3}$.36= $3^{3}$.(76-12+36)= $3^{3}$.100=27.100=2700 

e) 17.$3^{4}$ +18.17+17=17.81+18.17+17=17.(81+18+1)=17.100=1700

f) 20-[30-(5-$1)^{2}$]=20-[30-16]=20-14=6

g) 100-[29-(7-2$)^{2}$]=100-[29-25]=100-4=96

h) 75-(3.$5^{2}$-4. $2^{3}$)=75-(3.25-4.8)=75-(75-32)=75-43=32 

i) 3.$5^{2}$ +3:$2021^{0}$-54: $3^{3}$ 

=3.25+3:1-54:27=75+3-2=78-2=76

k) 150+50:5-2.$3^{2}$ =150+10-2.9=160-18=142

l) 100-2.(5.$3^{2}$ -32:$4^{2}$) =100-2.(5.9-32:16)=100-2.(45-2)=100-2.43=100-86=14

m) $3^{3}$.75+25. $3^{3}$-150=27.75+25.27-150=27.(75+25)-150=27.100-150=2700-150=2550 

n) 13.17-$4^{4}$: $4^{2}$+ $7^{2}$:7-1= 221-$4^{2}$+7-1=221-16+7-1=205+6=211 

o) 2.$3^{2}$+182+ $3^{1}$.(51:17)=2.9+182+3.3=18+182+9=209 

p) 15-$5^{2}$. $2^{3}$:( $10^{2}$.2)=15-25.8:(100.2)=15-200:200=15-1=14 

q) $5^{2}$. $2^{3}$-12.5 +170:17-$2^{3}$=25.8-60+10-8= 200-60+10-8=140+2=142