325 x 452 = ?
453 x 324 = ?
4. Đặt tính rồi tính:
a) 453 x 205 b) 25620 : 34
c) 452 x 760 d) 39488 : 162
a,92865
b,hình như lỗi đề nếu ko thì (12810/17)
c,343520
d,hình như lỗi đề nếu ko thì (19744/81)
like nha b
x+2/327+x+3/326+x+4/325+x+5/324+x+349/5=4
tìm x biết x+2/327+x+3/326+x+4/325+x+5/324=-4
tc tỉ lệ thức,ta có (ra số hơi to thông cảm )
\(\Leftrightarrow\frac{22990993x+80556557}{1870865100}=-\frac{4}{1}\Rightarrow\left(22990993x+80556557\right)1=-1870865100.4\)
\(\frac{\left(22990993x+80556557\right)1}{22990933x}=-\frac{1870865100.4}{22990993x}\)( chia 2 vế cho 2290933x)
\(\Rightarrow\frac{22990933x+80556557}{22990933x}=-\frac{1870865100.4}{22990933x}\)
=>x=-329
\(\frac{x+2}{327}+\frac{x+3}{326}+\frac{x+4}{325}+\frac{x+4}{324}+\frac{x+324}{5}=0\)
Tìm x
tìm x biết x+2/327+x+3/326+x+4/325+x+5/324=-4 vậy x=
tìm x, biết :
(x+2)/327 + (x+3)/326 + (x+4)/325 + (x+5)/324 = -4
\(\frac{x+2}{327}+\frac{x+3}{326}+\frac{x+4}{325}+\frac{x+5}{324}=-4\)
<=>\(\left(\frac{x+2}{327}+1\right)+\left(\frac{x+3}{326}+1\right)+\left(\frac{x+4}{325}+1\right)+\left(\frac{x+5}{324}+1\right)=0\)
<=>\(\frac{x+329}{327}+\frac{x+329}{326}+\frac{x+329}{325}+\frac{x+329}{324}=0\)
<=>\(\left(x+329\right)\left(\frac{1}{327}+\frac{1}{326}+\frac{1}{325}+\frac{1}{324}\right)=0\)
Vì \(\frac{1}{327}+\frac{1}{326}+\frac{1}{325}+\frac{1}{324}\ne0\Rightarrow x+329=0\Leftrightarrow x=-329\)
tính x+2/327+x+2/326+x+4/325+x+5/324+x+329/5 =0
Tìm x biết : x-2/327 + x-3/326 + x-4/325 + x-5/324 + x-344/5 =1
x+2 / 327 + x+3 / 326 + x+4 / 325 + x+5 / 324 + x+349 / 5 =0
tìm x
(x + 2) / 327 + (x + 3) / 326 + (x + 4) / 325 + (x + 5) / 324 + (x + 349) / 5 = 0
<=> (x + 2) / 327 +1+ (x + 3) / 326 +1+ (x + 4) / 325 +1+ (x + 5) / 324 +1+ (x + 349) / 5 -4= 0
<=> (x+ 329)/327 + (x+ 329)/326 + (x+ 329)/325 + (x+ 329)//324 + (x+ 329)/5 =0
<=> (x+ 329).(1/327 + 1/ 326 + 1/325 + 1/324 +1/5) =0
Do (1/327 + 1/ 326 + 1/325 + 1/324 +1/5) # 0 nên x+ 329 =0 => x= -329