Question

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

b) 4 . ( 18 - 15 ) - ( 5 - 3) . 3²

Help me

Answer 1

a) \(100:\left\{250:\left[450-\left(4.5^3-25.4\right)\right]\right\}\)

\(=100:\left\{250:\left[450-\left(4.125-25.4\right)\right]\right\}\)

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

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

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

\(=100:5\)

\(=20\)

b) \(4\left(18-15\right)-\left(5-3\right).3^2\)

\(=4.3-2.3^2\)

\(=4.3-2.9\)

\(=12-18\)

​\(=-6\)​

Answer 2

100:{250:[450-(4.5³ -25.4)]}

=100:{250:[450-(4.125-25.4)]}

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

=100:{250:[450-400]}

=100:{250:50}

=100:5

=20

b)4.(18-15)-(5-3).3²

=4.(18-15)-(5-3).9

=4.3-2.9

=12-18

=(-6)

=4.

Answer 3

sorry thua cho cuoi cung

cai chu

=4 la sai nha!

mk nham.xin loi.nhung nho tick dung cho mk do!