Question

Thực  hiện phép tính :

a) 4.5²-81:3²

b) 3³.23-3³.19

c) 2⁴.5-[ 131-(13-4)²]

d) 100: { 250: [ 450-(4.5³-2².25) ] }

Ai nhanh đúng thì mk tik😊😊

Answer 1

a) \(4.5^2-81:3^2=4.25-81:9=100-9=91\)

b) \(3^3.23-3^3.19=3^3.\left(23-19\right)=27.4=108\)

c) \(2^4.5-[131-\left(13-4\right)^2]=16.5-\left(131-9^2\right)=80-\left(131-81\right)=80-50=30\)

Answer 2

d) \(100:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\)

\(=100:\left\{250:\left[450-4.\left(125-25\right)\right]\right\}\)

\(=100:\left[250:\left(450-4.100\right)\right]\)

\(=100:\left[250:\left(450-400\right)\right]=100:\left(250:50\right)=100:5=20\)

Answer 3

mình cũng ko bít làm