What's up bro

Mạnh thích bóng chuyền nhất

AB=9cm;AC=4cm=>BC=9cm-4cm=5cm

BM=\(\frac12\) BC=>BM=5cm.\(\frac12\) =2,5cm

Vậy BM=2,5cm

Thể tích rubik của Minata là:5^3=125(dm^3)

Thể tích rubik mẹ mua là:10^3=1000(dm^3)

Ta có:

1000:125=8

=>Thể tích rubik mẹ mua gấp 8 lần thể tích rubik của Minata

Vậy Minata sai

a)571+216+129+124=(571+129)+(216+124)=700+340=1040

b)27.74+26.27-355=27.(74+26)-355=27.100-355=2700-355=2345

c)100:{250:[40-(4.5³-2².25)]}=100:250.20.[40-100.(5-1)]=8.(40-400)=8.(-360)=-2880

a)320;4914;90

b)320;2315;90

c)4914;90;543

d)90

\(\dfrac{-3}{8}\)=\(\text{​​}\text{​​}\text{​​}\dfrac{-\text{9}}{\text{2}\text{4}}\)

\(\dfrac{\text{5}}{-12}\)=\(\dfrac{-\text{5}}{\text{1}\text{2}}\)=\(\dfrac{-\text{1}\text{0}}{\text{2}\text{4}}\)

\(\text{​​}\text{​​}\text{​​}\dfrac{-\text{9}}{\text{2}\text{4}}\)>\(\dfrac{-\text{1}\text{0}}{\text{2}\text{4}}\)=>\(\dfrac{-3}{8}\)>\(\dfrac{\text{5}}{-12}\)

\(\dfrac{\text{3131 ​ }}{5252}\) =\(\dfrac{31.1\text{0}1}{\text{52 }.1\text{0}\text{1}}\)=\(\dfrac{31}{\text{52 }}\)