605,16 + 247, 64 =852,8

362 , 95 - 77, 28=285,67

36 , 14 x 4 , 2=151,788

45 , 15 : 8 ,6=5,25

= (25.4).[(-2). (-5)].125-(19+9).25+19.30

=100.10.125-28.25+19.30

=125000-28.5.5+19.5.6

=125000-5.(140+95)

=125000-5.235

=125000-1175

=123825

a, A = 25.(-2).4.(-5).125 - 19.25 + 9.25 + 19.30
= 125000 - 475 + 225 + 570
= 125320
@Nam Joo Hyuk

\(\frac{45x23-14}{45x22+31}=\frac{1035-14}{990+31}=\frac{1021}{1021}\)

\(=47-\left[\dfrac{\left(45\cdot16-25\cdot12\right)}{14}\right]\)

=47-420/14

=47-30

=17

a, -2

b, -9

câu hỏi quái gì thế??????????

mk không ghi lại đề đâu

   giải

 45 - x = 57 + 14

 45 - x  = 71

       x  = 71 - 45

       x  = 26

không biết

\(a,14-5+x=30\)

\(\Rightarrow9+x=30\Rightarrow x=30-9\)

\(\Rightarrow x=21\)

\(b,45-\left(3+x\right)=14\)

\(\Rightarrow3+x=45-14\)

\(\Rightarrow3+x=31\Rightarrow x=31-3\)

\(\Rightarrow x=28\)

\(c,18+\left(-3+x\right)-\left(44-x\right)=55\)

\(\Rightarrow18-3+x-44+x=55\)

\(\Rightarrow2x-29=55\Rightarrow2x=55+29\)

\(\Rightarrow2x=84\Rightarrow x=84:2\)

\(\Rightarrow x=42\)

\(d,\left(x-45\right).27=0\)

\(\Rightarrow x-45=0\Rightarrow x=45\)

\(a,14-5+x=30\)

\(\Rightarrow9+x=30\)

\(\Rightarrow x=30-9=21\)