\(y\times1+y\times2+y\times27-\left(99-22\right)=277\)
\(y\times\left(1+2+27\right)-77=277\)
\(y\times30-77=277\)
\(y\times30=277+77\)
\(y\times30=354\)
\(y=\dfrac{354}{30}\)
\(y=\dfrac{59}{5}\)
yx9-yx2=41+22
Tm y
yx1-y:1+y=185
33+99+88+77+66+55+44+22+11=?
\(99 -55 + 44 - 55 + 22 =\)
111+333+555+777+999+11+22+33+44+55+66+77+88+99
1+2+3+4+5+6+7+8+9+11+44+55+22+33+77+55+88+66+99+111+444+......+666666*13
11+22+33+44+55+66+77+88+99+00=?
( 1 k đây ai muốn thì kb nhé )
(88+66+22+44):2= (11+33+55+77+99):5=
tính tổng
a) 1 + 2 + 3 +.....+ 97 + 98 + 99 +100
b) 23 + 65 + 77 + 76 + 35 + 24
c) 45 + 78 + 65 + 22
