x + 5/2 x 2/3 = 5/2
x + 5/3 = 5/2
x = 5/2 - 5/3
x = 15/6 - 10/6
= 5/6
`x+5/2xx2/3=5/2`
`x+5/3=5/2`
`x=5/2-5/3`
`x=15/6-10/6=5/6`
x + 5/2 x 2/3 = 5/2
x + 5/3 = 5/2
x = 5/2 - 5/3
x = 15/6 - 10/6= 5/6
x + 5/2 x 2/3 = 5/2
x + 5/3 = 5/2
x = 5/2 - 5/3
x = 15/6 - 10/6
= 5/6
`x+5/2xx2/3=5/2`
`x+5/3=5/2`
`x=5/2-5/3`
`x=15/6-10/6=5/6`
x + 5/2 x 2/3 = 5/2
x + 5/3 = 5/2
x = 5/2 - 5/3
x = 15/6 - 10/6= 5/6
X - 3 = 5 2 x X = 2 2 : X = 1 X : 5 = 22
_ _ _ _ _ _ _
2 6 5 3 5 3 11
Giúp mình ạ
1) 1/3 x 1/2 x 3/7 2) 5/4 x 1/3 + 1/7 3) 8 x ( 8/9-2/3 ) 4) 5/6 x 48/20 x 1/2 5) ( 2/5 + 3/4 ) x 8 6) 10 x ( 1/2-1/5 )
Tìm x biết :
x + 4/5 = 4/5 + ( 3/7 + 3/5 ) 5/7 + x/35 = 4/5
x < 3/4 + 2 2/3 + 1 < x < 5/6 + 4
x< 5/6 - 3/4 2/3 < x < 2 - 5/6
Bài 1 : Tính bằng hai cách
a) ( 6/11 + 5/11 ) x 3/7 =
b) 3/5 x 7/9 - 3/5 x 2/9 =
c) ( 6/7 - 4/7 ) : 2/5 =
d) 8/15 : 2/11 + 7/15 : 2/11 =
Bài 2 : Tính
a) 2 x 3 x4/3 x 4 x 5 =
b) 2/3 x 3/4 x 4/5 : 1/5 =
c) 1 x 2 x 3 x 4 / 5 x 6 x 7 x8 =
d) 2/5 x 3/4 x 5/6 : 3/4 =
Bài 299: Tính
1) 1/3 x 1/2 x 3/7
2) 5/4 x 1/3 + 1/7
3) 8 x ( 8/9-2/3 )
4) 5/6 x 48/20 x 1/2
5) ( 2/5 + 3/4 + x 8
6) 10 x ( 1/2 - 1/5 )
Trình bày rõ cách làm giúp ạ!!
Tính bằng 2 cách:
(2/3 x 4/5) x 5/6
(1/2 + 1/3) x 1/5
(2/3 x 4/5) x 5/6
(1x2 + 1/3) x 1/5
35 nhan x + 1/2 : 5/3 - 5/4 = 1/2 x 1/3
3/5 nhan x + 1/2 : 5/3 - 5/4 = 1/2 x 1/3
Tính bằng cách thuận tiện:
a) 2/3 x 4/9 + 2/3 x 5/9
b, 7/5 x 3/4 - 1/2 x 3/4
c, ( 5/6 + 5/8 ) x 2/3
a) = ……………………………3/7 x 4/5………………………… | 2/5 + 3/4 ………………………..……….…..…………………… |
b) =……2/5 : 4……………………………………….…………… | ……1/4 + 2………………….……….………………………… |
c) =…2/5 : 2/3……………………………………..…………..… | 2/3 - 38…………………………………………………………… |
d) 5 - 2/3………………………………………..…..………… | 2/5 x 3………………………………………………………… |
tìm x 2*x+1/9=5/3 b 2/9*x+1/5*x=2/3-3/5