Tình:
a, -5,13 : ( 145/28 - 17/9 . 5/4 + 79/63 )
Tính giá trị của các biểu thức : A= -5,13 :( \(\frac{145}{28}-\frac{17}{9}.1,25+\frac{79}{63}\))
A = \(-\frac{513}{100}:\left(\frac{145}{4.7}-\frac{17}{9}.\frac{5}{4}+\frac{79}{7.9}\right)=-\frac{513}{100}:\frac{145.9-17.5.7+79.4}{4.7.9}=-\frac{513}{100}:\frac{57}{14}\)
A = \(-\frac{513}{100}.\frac{14}{57}=\frac{-63}{50}\)
A =-5.13:(145/28 -17/9 -1.25 +79/63) = ?
hoang xuan ngan bạn tả lời sai rồi đó nhiên
A=-5,13:(154/28- 17/9 * 1,25+79/36)
\(=-5.13:\dfrac{16}{3}=-\dfrac{513}{100}\cdot\dfrac{3}{16}=\dfrac{-1539}{1600}\)
-5,13:(145/28-17/9.125/100+73/63) |
bằng 1,290179641
hok tốt
k đúng cho mình nhe thanks/very thanks
tính giá trị biểu thức
-5,13/(5 5/28-1 8/9*1,25+1 16/63)
tính giá trị của biểu thức:
\(A=-5,13:\left(5\dfrac{5}{28}-1\dfrac{8}{9}.1,25+1\dfrac{16}{63}\right)\)
\(A=-5,13:\left(5\dfrac{5}{28}-1\dfrac{8}{9}.1,25+1\dfrac{16}{63}\right)\)
\(=-5,13:\left(5\dfrac{5}{28}-2\dfrac{13}{36}+1\dfrac{16}{63}\right)\)
\(=5,13:\left[\left(5-2+1\right)+\left(\dfrac{5}{28}-\dfrac{13}{36}+\dfrac{16}{63}\right)\right]\)
\(=5,13:\left(4+\dfrac{1}{14}\right)\)
\(=1,26\)
`A=-5,13:(5 5/28-1 8/9 .1,25+1 16/63)`
`A=-513/100:(145/28-17/9 .5/4+79/63)`
`A=-513/100:(145/28-85/36+79/63)`
`A=-513/100:(355/126+79/63)`
`A=-513/100:57/14`
`A=-63/50`
\(A=-5,13:\left(5\dfrac{5}{28}-1\dfrac{8}{9}.1,25+1\dfrac{16}{63}\right)\)
\(A=-5,13:\left[\left(5-2+1\right)+\left(\dfrac{5}{28}-\dfrac{18}{36}+\dfrac{16}{63}\right)\right]\)
\(A=-5,13:\left(4+\dfrac{1}{14}\right)\)
\(A=-5,13:\left(\dfrac{56}{14}+\dfrac{1}{14}\right)\)
\(A=-5,13:\dfrac{57}{14}\)
\(A=\dfrac{-513}{100}:\dfrac{57}{14}\)
\(A=\dfrac{-513}{100}\times\dfrac{14}{57}\)
\(A=\dfrac{-63}{50}\)
Bài 1 Tìm x
a) 3,2.x +(1,2).x+2,7= -4,9
b) (-5,6).x+2,9.x-3,86= -9,8
Bài 2
A = \(-5,13:\left(\frac{145}{28}-\frac{17}{9}.1,25+1\frac{16}{63}\right)\)
B= \(\left(3\frac{1}{3}.1,9+19,5:4\frac{1}{3}\right).\left(\frac{62}{75}-\frac{4}{25}\right)\)
giuk mik tickcho nhé
1, Thực hiện phép tính :
A = 15/34 + 7/21 + 9/34 - 32/17 + 2/3
B = 114/7 : ( - 3/5) - 198/7 : (-3/5)
C = 25 . ( -1/3 ) + 1/5 - 2.(-1/2)^2 - 1/2
D = ( -2)^3 . ( 3/4 - 0,25 ) : ( 9/4 - 7/6 )
E = 5√16 - 4√9 + √25 - 0,3 √400
F = (-3/2)^2 + | -5/6 | - 1/4 : 6
I = -1,53 : ( 145/28 - 17/9 . 1,25 + 79/63)
K = ( 10/3 . 1,9 + 9,5 : 13/3 ) . ( 62/75 - 4/25 )
Giúp mình nha , mình đang cần gấp !
1, Thực hiện phép tính :
A = 15/34 + 7/21 + 9/34 - 32/17 + 2/3
B = 114/7 : ( - 3/5) - 198/7 : (-3/5)
C = 25 . ( -1/3 ) + 1/5 - 2.(-1/2)^2 - 1/2
D = ( -2)^3 . ( 3/4 - 0,25 ) : ( 9/4 - 7/6 )
E = 5√16 - 4√9 + √25 - 0,3 √400
F = (-3/2)^2 + | -5/6 | - 1/4 : 6
I = -1,53 : ( 145/28 - 17/9 . 1,25 + 79/63)
K = ( 10/3 . 1,9 + 9,5 : 13/3 ) . ( 62/75 - 4/25 )
Giúp mình nha , mình đang cần gấp !