Question

a)100 : { 250 : [ 450 - ( 4 . 5³ - 2² . 25 ) ] }

b) 109 . 5² - 3² . 25

c) [ 5² . 6 - 20 . ( 37 - 2⁵ ) ] : 10 - 20

Bn Nguyễn Nam giúp mk nha !!!

Answer 1

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

\(=100:\left\{250:\left[450-\left(4.125-4.25\right)\right]\right\}\)

\(=100:\left\{250:\left[450-\left(500-100\right)\right]\right\}\)

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

\(=100:\left(250:50\right)\)

\(=100:5\)

\(=20\)

b) \(109.5^2-3^2.25\)

\(=109.25-9.25\)

\(=25\left(109-9\right)\)

\(=25.100\)

\(=2500\)

c) \(\left[5^2.6-20.\left(37-2^5\right)\right]:10-20\)

\(=\left[5^2.6-20.\left(37-32\right)\right]:10-20\)

\(=\left(5^2.6-20.5\right):10-20\)

\(=\left(25.6-20.5\right):10-20\)

\(=\left(150-100\right):10-20\)

\(=50:10-20\)

\(=5-20\)

\(=-15\)