ai giúp mình với huhu
(1/6 + 1/10 + 1/15) : (1/6 + 1/10 - 1/15 )
= (5/30 + 3/30 + 2/30) : (5/30 + 3/30 - 2/30)
= 7/30: 1/5
= 7/30.5 = 7/6.
sai rồi bạn ơi!! 5+3+2 sao bằng 7 đc????
mình ra 5/3
(1/6 + 1/10 + 1/15) :(1/6 +1/10-1/15)
(1/2-1/3+1/4-1/5):(1/4-1/6)
(1/6 +1/10+1/15) / (1/6+1/10-1/15)
(1/2-1/3+1/4-1/5) / (1/4-1/6)
a ) 43/20 + 17/6 : ( 5/8 + 7/30 )
b ) ( 1/6 + 1/10 + 1/15 ) : ( 1/6 + 1/10 - 1/15 )
tính giá trị của biểu thức
A (1/6 + 1/10 + 1/15 ) : (1/6+1/10-1/15) / (1/2-1/3+1/4-1/5) : (1/4-1/6)
B (3/20+1/2-1/15 )12/49 / 3 1/3 + 2/9
\(\left(\frac{1}{6}+\frac{1}{10}+\frac{1}{15}\right):\left(\frac{1}{6}+\frac{1}{10}-\frac{1}{15}\right)\)
các bn giúp mk nhé
a ( 1/6 + 1/10 + 1/15 ) : ( 1/6 + 1/10 - 1/15)
b ( 1/2 - 1/3 + 1/4 - 1/5 ) : ( 1/4 - 1/5)
\(\dfrac{\left(\dfrac{1}{6}+\dfrac{1}{10}+\dfrac{1}{15}\right):\left(\dfrac{1}{6}+\dfrac{1}{10}-\dfrac{1}{15}\right)}{\left(\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{4}-\dfrac{1}{5}\right):\left(\dfrac{1}{4}-\dfrac{1}{6}\right)}=\)
tính giá trị biểu thức :
A= (1/6+1/10+1/15):(1/6+1/10-1/15) phần (1/2-1/3+1/4-1/5):(1/4-1/6)
B= (3/20+1/2-1/15).12/49 phần 3\(\frac{1}{3}\)+ \(\frac{2}{9}\)
ai giúp em câu này đi
a,6/1*3*7+6/3*7*9+6/7*9*13+6/9*13*15+6/13*15*19
b,1/1*3*7+1/3*7*9+1/7*9*13+1/9*13*15+1/13*15*19
c,1/2*4*6+1/4*6*8+1/6*8*10+1/8*10*12*14+...+1/96*98*100
d,5/1*5*8+5/5*8*12+5/8*12*15+...+5/33*36*40
* là dấu nhân / là phần nha
