1+2+123+1234+12345
123456 x 2 +12 +123 -1234 + 123 -12345
(123 456 x 2) + 12 + 123 - 1234 + 123 - 12 345 = 233591
đáp án là : 233591
123456789+12345678+1234567+123456+12345+1234+123+12+1=
123456789+12345678+1234567+123456+12345+1234+123+12+1=137174205
1234*12345+(789+123)=?
1234*12345+(789+123)= 1234*12345 + 912
= 15233730 + 912
= 15234642
-12+(-123)-(-1234)-(-12345)
-12+(-123)-(-1234)-(-12345)=13444
67482375713645783240623476-4531945691471554573
ai on điểm danh nè,kb nha
1234567-123456-12345-1234-123-12-1=?////
1234567-123456-12345-1234-123-12-1=1097396
k mk nhak
kp nak
Love
tinh
-12+(-123)-(-1234)-(-12345)
-12+(-123)-(-1234)-(-12345)
=-12+(-123)+1234+12345
=-135+1234+12345
=(-135+12345)+1234
=12210+1234
=13444
-12 + (-123)-(-1234)-(-12345)
= -135 +1234 +12345
= -135 + 13579
= 13444
123 + 1234 + 12345 = ?
Ai tk mình mình tk lại
13702 bn trả lời đi rồi mk tk tk lại cho mk nghe
123 + 1234 + 12345 = 13702
Ai tk mình mình tk lại
Tính:123-321+456-654+789-987+1234-4321+...+12345-54321=bao nhiêu
Aj tính dc ko vậy^^
Bài 1 : Tính
a) A = \(\left(\dfrac{2}{3}+\dfrac{3}{4}-\dfrac{7}{12}\right):\left(\dfrac{55}{123}+\dfrac{555}{1234}+\dfrac{5555}{12345}\right)\)
b) B = \(\dfrac{5^2}{1.6}+\dfrac{5^2}{6.11}+\dfrac{5^2}{11.16}+...+\dfrac{5^2}{101.106}\)
c) C = \(\dfrac{2x^2+3x-1}{3x-2}\) với \(\left|x-1\right|=2\)
a, bạn tự làm
b, \(B=\dfrac{5^2}{5}\left(1-\dfrac{1}{6}+\dfrac{1}{6}-\dfrac{1}{11}+\dfrac{1}{11}-\dfrac{1}{16}+...+\dfrac{1}{101}-\dfrac{1}{106}\right)\)
\(=5\left(1-\dfrac{1}{106}\right)=\dfrac{5.105}{106}=\dfrac{525}{106}\)
c, đk : \(x\ne\dfrac{2}{3}\)
Ta có : \(\left|x-1\right|=2\Leftrightarrow\left[{}\begin{matrix}x=3\\x=-1\end{matrix}\right.\)(tm)
Với x = 3 suy ra \(C=\dfrac{2.9+9-1}{3.3-2}=\dfrac{26}{7}\)
Với x = -1 suy ra \(C=\dfrac{2-3-1}{-3-2}=\dfrac{-2}{-5}=\dfrac{2}{5}\)