A=-5,13:(154/28- 17/9 * 1,25+79/36)
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 = \(-\frac{513}{100}.\frac{14}{57}=\frac{-63}{50}\)
Tình:
a, -5,13 : ( 145/28 - 17/9 . 5/4 + 79/63 )
a)\(-\frac{5}{13}:\left(\frac{145}{28}-\frac{17}{9}.\frac{5}{4}+\frac{79}{63}\right)\)
\(=-\frac{5}{13}:\left(\frac{145}{28}-\frac{85}{36}+\frac{79}{63}\right)\)
\(=-\frac{5}{13}:\left(\frac{145}{28}-\frac{31}{28}\right)\)
\(=-\frac{5}{13}:\frac{57}{14}\)
\(=-\frac{70}{741}\)
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`
\(A=-5,13:\left(5\dfrac{5}{28}-1\dfrac{8}{9}.1,25+1\dfrac{16}{63}\right)\)
\(A=-5,13:\left[\left(5-2+1\right)+\left(\dfrac{5}{28}-\dfrac{18}{36}+\dfrac{16}{63}\right)\right]\)
\(A=-5,13:\left(4+\dfrac{1}{14}\right)\)
\(A=-5,13:\left(\dfrac{56}{14}+\dfrac{1}{14}\right)\)
\(A=-5,13:\dfrac{57}{14}\)
\(A=\dfrac{-513}{100}:\dfrac{57}{14}\)
\(A=\dfrac{-513}{100}\times\dfrac{14}{57}\)
\(A=\dfrac{-63}{50}\)
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:(\(5\dfrac{5}{28}-1\dfrac{8}{9}.1,25+1\dfrac{16}{63}\)
A= -5,13: (\(5\dfrac{5}{28}\)-\(1\dfrac{8}{9}\).1,25+\(1\dfrac{16}{63}\))
A=-5,13:(\(\dfrac{145}{28}\)-\(\dfrac{17}{9}\). 1,25+\(\dfrac{79}{63}\))
A= -5,13:(\(\dfrac{145}{28}\)-\(\dfrac{85}{36}\)+ \(\dfrac{79}{63}\))
A= -5,13:\(\dfrac{57}{14}\)
A= -\(\dfrac{63}{50}\)
\(A=-5,13:\left(5\dfrac{5}{28}-1\dfrac{8}{9}.1,25+1\dfrac{16}{63}\right)\)
\(A=-5,13:\left(5\dfrac{5}{28}-\dfrac{85}{36}+1\dfrac{16}{63}\right)\)
\(A=-5,13:\dfrac{57}{14}\)
\(A=\dfrac{-63}{50}\)
\(A=-5,13:\left(\dfrac{5\cdot28+5}{28}-\dfrac{1\cdot9+8}{9}\cdot1,25+\dfrac{1\cdot63+16}{63}\right)\)
\(A=-5,13:\left(\dfrac{145}{28}-\dfrac{85}{36}+\dfrac{79}{63}\right)\)
\(A=-5,13:\left(\dfrac{57}{14}\right)=-5,13\cdot\dfrac{14}{57}=-\dfrac{63}{50}\)
CHÚC BẠN HỌC TỐT !!!
A = \(\left(-1+3\frac{2}{5}+\frac{1}{4}\right):\left(-4\right)\)
B = \(\left(0,645:0,3-1\frac{17}{150}\right):\left(4:6,25-\frac{1}{5}+\frac{1}{7}.1,96\right)-11,125\)
C=\(11,26-5,13:[5\frac{5}{28}-1\frac{8}{9}.1,25+1\frac{16}{63}]\)
bài 95 sgk toán 7 tập 1 trang 45
A=-5,13 : (5và 5/28 trừ 1và 8/9 nhân 1,25 cộng 1 và16/63
P/S : giải giống sách bài tập
tính M=-5,13.(\(5\frac{5}{28}\)-\(\frac{19}{9}\)-1,25+\(1\frac{16}{69}\))
Lời giải:
$M=-5,13(5+\frac{5}{28}-2-\frac{1}{9}-1,25+1+\frac{16}{69})$
$=-5,13.\frac{8837}{2898}=-15,643$
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