Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
1
a )
( 9407 - 7274 ) : y = 8058 : 34
2133 : y = 237
y = 2133 : 237
y = 9
b )
y x 128 - y x 17 - y x 11 = 576000
y x ( 128 - 17 - 11 ) = 576000
y x 100 = 576000
y = 576000 : 100
y = 5760
2
a )
( 125 x 36 ) : ( 5 x 9 ) =
4500 : 45 =
100
b )
1/10 + 2/10 + 3/10 + 4/10 + 5/10 + 6/10 + 7/10 + 8/10 + 9/10=
( 1/10 + 9/10 ) + ( 2/10 + 8/10 ) + ( 3/10 + 7/10 ) + ( 4/10 + 6/ 10 ) + 5/10=
1 + 1 + 1 + 1 + 0,5 =
4,
Chúc bạn học giỏi nhé !
y x 2 + y x 3 + y x 5 = 9600
y x ( 2 + 3 + 5 ) = 9600
y x 10 = 9600
y = 9600 : 10
y = 960
_HT_
1/ Tìm y
a) y x 42 = 4200
y = 4200 : 42
y = 100
b) y : 42 = 200
y = 200 x 42
y = 8400
2/ Tính nhanh
a) 21 x 34 + 21 x 16
= 21 x ( 34 + 16 )
= 21 x 50
= 1050
b) 34 x 56 + 56 x 36
= 56 x ( 34 + 36 )
= 56 x 70
= 3920
a.34 + Y x 1/5 = 7/8
Y x 1/5 = 7/8 - 34
Y x 1/5 = -33,125
Y = -33,125 : 1/5
Y= -165,625
b.7 x Y - 36 = 4 x Y + 504
7 x Y - 4 x Y = 504 + 36
3 x Y = 540
Y = 180
c.Y x 4 + Y x 5 = 720
Y x 9 = 720
Y = 80
a) 34+y x 1/5=7/8
y x 1/5=7/8-34
y x 1/5=-265/8
y =-265/8 : 1/5
y = -1325/8
b) 7 x y - 36 = 4 x y + 504
7 x y - 4 x y = 504 + 36
y x ( 7-4 ) = 540
y x 3 = 540
y = 540 :3
y = 180
c ) y x 4 + y x 5=720
y x ( 4+5 ) =720
y x 9 = 720
y = 720 : 9
y = 80
\(a.16307:y=45\left(dư\text{ }17\right)\)\(\Leftrightarrow45\text{×}y+17=16307\)
\(45\text{×}y=16307-17\)
\(45\text{×}y=16290\)
\(y=16290:45\)
\(y=362\)
\(b.y\text{×}52+y\text{×}48=36700\)
\(y\text{×}\left(52+48\right)=36700\)
\(y\text{×}100=36700\)
\(y=36700:100\)
\(y=367\)
a) 16307= 45*y+17 -> y=(16307-17)/45= 362
b) y*(52+48)= 36700 -> y=36700/100= 367
\(y.\left(1+2+3\right)=36\)
\(y.6=36\)
\(y=36:6\)
\(y=6\)
Chú ý: dấu . là nhân
y x 1 + y x 2 + y x 3 = 36
y x ( 1 + 2 +3 ) = 36
y x 6 = 36
y = 36 : 6
y = 6