2⁴x5-[131-(13-4)²]

=2⁴x5-[131-9²]

=2⁴x5-[131-81]

=16x5-50

=80-50

=30

bằng 30 nha

\(2^4.5-\left[131-\left(13-4\right)^2\right]\)

\(=16.5-\left[131-121\right]\)

\(=16.5-10\)\(=80-10=70\)

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

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

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

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

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

mình cũng ko bít làm

\(2^4.5-\left[131-\left(13-4\right)^2\right]\)

\(=2^4.5-\left(131-9^2\right)\)

\(=2^4.5-\left(131-81\right)\)

\(=2^4.5-50\)

\(=16.5-50\)

\(=80-50\)

\(=30\)

2⁴.5-[131-(13-4)^2]

=2⁴.5-[131-81]

=16.5-50

=30

\(2^4.5-\left[131-\left(13-4\right)^2\right]\)

\(=2^4.5-\left[131-9^2\right]\)

\(=2^4.5-\left[131-81\right]\)

\(=2^4.5-50\)

\(=16.5-50\)

\(=80-50\)

\(=30\)

-4/11+5/6+7/11-5/6

=(-4/11+7/11)+(5/6-5/6)

=3/11+0

=3/11

Làm là giúp đủ 3 câu hộ mình. 1 câu k k đâu !

3/7*(0,5+11/2)-2/7:25%

=3/7*(0,5+11/2)-2/7:1/4

=3/7*(0,5+11/2)-2/7*4

=3/7*(1/2+11/2)-2/7*4

=3/7*6-2/7*4

=18/7-8/7

=10/7