1008 - 17119 : ( 119 - 714 : 7 )

= 1008 - 17119 : ( 119 - 17 . 42 : 7 )

= 1008 - 17119 : ( 119 - 17 . 6 )

= 1008 - 17119 : ( 119 - 102 )

= 1008 - 17119 : 17 

= 1008 - 1007

= 1

=49-9+200=240

\(=7^2-9+8.25=49-9+200=40+200=240\)

cần đáp án nha!

a

A

\(=600:\left\{450:\left[450-\left(500-200\right)\right]\right\}\)

\(=600:\left\{450:\left[450-300\right]\right\}\)

\(=600:3=200\)

=600:{450:[450-(4.125-8.25)]}

=600:{450:[450-(8.125-4.25)]}

=600:{450:[450-300]

=600:{450:150}

=600:3

=200

Lần sau bn nhớ ghi đúng thứ tự ngoặc nhé

-886 nha 

\(160-\left(23,52-6,25\right)=160-17,27.\)

                                             \(=142,83\)   

Ủng hộ nhé

Hình như đề sai bạn à?

\(3^2-4x=\left(-71\right)+800\)

\(\Rightarrow9-4x=729\)

\(\Rightarrow-4x=720\)

\(\Rightarrow x=-180\)

\(\Rightarrow9-4x=729\\ \Rightarrow4x=9-729\\ \Rightarrow4x=-720\\ \Rightarrow x=-180\)

a. 45.34 + 45.37 + 71.23 + 33.71

= 45.(34 + 37) + 71.(23 + 33)

= 45.71 + 71.56

= 71.(45 + 56)

= 71 . 101

= 7171

a) \(45.34+45.37+71.23+33.71=45\left(34+37\right)+71\left(23+33\right)=45.71+71.56=71\left(45+56\right)=71.101=7171\)

b) \(23.46+23.52+98.35+98.42=23\left(46+52\right)+98\left(35+42\right)=23.98+98.77=98\left(23+77\right)=98.100=9800\)

c) \(27.34+27.56+90.20+26.90=27\left(34+56\right)+90\left(20+26\right)=27.90+90.46=90\left(27+46\right)=90.73=6570\)

d) \(12.37+12.78+115.29+115.59=12\left(37+78\right)+115\left(29+59\right)=115.12+115.88=115\left(12+88\right)=115.100=11500\)

b. 23.46 + 23.52 + 98.35 + 98.42

= 23.(46 + 52) + 98.(35+42)

= 23.98 + 98.77

= 98.(23 + 77)

= 98 . 100

= 9800

5

5

\(=9-2.2=9-4=5\)