-7/13 - x = -11/39 + 7/13
DT
Những câu hỏi liên quan
{(-5/7)-7/9+9/11-11/13}x(3-3/4)
(10/21+14/27-6/11+22/39):(2-2/3)
5/9 × 8/17+ 3/17 : 9/7 - 5/9 7/3 × 6/ 11 + 7 / 11 - 5 /13 + 6/ 13 -7/25÷ (-14/39)÷ 50 /78 Giúp tui với tui đang cần gấp
Tính:
a,35/11+(-7/13)-6/13-13/11 b,2 1/7-(-7/9)-25/9+6/7 c,132/321 x(-103/13)+(-27/13)x132/321
(Lưa ý:ở í b 2 1//7 là hỗn số)
a: =35/11-13/11-7/13-6/13
=2-1=1
b: =2+1/7+6/7+7/9-25/9
=2+1-2=1
c: \(=\dfrac{132}{321}\left(-\dfrac{103}{13}-\dfrac{27}{13}\right)=\dfrac{-132}{321}\cdot10=-\dfrac{440}{107}\)
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5-7/39÷7/13+8/9÷4
1 và 13/15:0,75-(11/20+25%) ÷7/3
a:\(=5-\dfrac{7}{39}\cdot\dfrac{13}{7}+\dfrac{2}{9}=5-1+\dfrac{2}{9}=4+\dfrac{2}{9}=\dfrac{38}{9}\)
b: \(=\dfrac{28}{15}:\dfrac{3}{4}-\left(\dfrac{11}{20}+\dfrac{5}{20}\right)\cdot\dfrac{3}{7}\)
\(=\dfrac{112}{45}-\dfrac{4}{5}\cdot\dfrac{3}{7}\)
\(=\dfrac{112}{45}-\dfrac{12}{35}=\dfrac{676}{315}\)
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tìm x
a) 39/7 : X =13
b) 2/3 . X + 1/2 = 1/10
c) X : 8/11 = 11/3
d) 2/9 - 7/8 . X = 1/3
\(a,\frac{39}{7}:x=13\)
\(x=\frac{39}{7}:13=\frac{3}{7}\)
\(b,\frac{2}{3}\cdot x+\frac{1}{2}=\frac{1}{10}\)
\(\frac{2}{3}.x=\frac{1}{10}-\frac{1}{2}=-\frac{2}{5}\)
\(x=-\frac{2}{5}:\frac{2}{3}=-\frac{3}{5}\)
\(c,x:\frac{8}{11}=\frac{11}{3}\)
\(x=\frac{11}{3}\cdot\frac{8}{11}=\frac{8}{3}\)
\(d,\frac{2}{9}-\frac{7}{8}\cdot x=\frac{1}{3}\)
\(\frac{7}{8}.x=\frac{2}{9}-\frac{1}{3}=-\frac{1}{9}\)
\(x=-\frac{1}{9}:\frac{7}{8}=-\frac{8}{63}\)
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cảm ơn Ngyễn Thị Ngọc Ánh nha bạn lm đúng mà mình k nhầm xl bạn nhìu
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\(\(a,\frac{39}{7}:x=13\) \(x=\frac{39}{7}:13=\frac{3}{7}\) \(b,\frac{2}{3}\cdot x+\frac{1}{2}=\frac{1}{10}\) \(\frac{2}{3}.x=\frac{1}{10}-\frac{1}{2}=-\frac{2}{5}\) \(x=-\frac{2}{5}:\frac{2}{3}=-\frac{3}{5}\) \(c,x:\frac{8}{11}=\frac{11}{3}\)\)
\(\(x=\frac{11}{3}\cdot\frac{8}{11}=\frac{8}{3}\) \(d,\frac{2}{9}-\frac{7}{8}\cdot x=\frac{1}{3}\) \(\frac{7}{8}.x=\frac{2}{9}-\frac{1}{3}=-\frac{1}{9}\) \(x=-\frac{1}{9}:\frac{7}{8}=-\frac{8}{63}\) \)
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Tính nhanh:
a)11/7 x 8/13 + 8/13 x 3/7 + 8/13
b)5/7 x 8/13 + 8/13 x 9/7 - 8/13
c)156 x 199 - 57 x 199 - 199
a.11/7.8/13+8/13.3/7+8/13
=8/13.(11/7+3/7+1)
=8/13.3
=24/13
b.5/7.8/13+8/13.9/7-8/13
=8/13.(5/7+9/7-1)
=8/13.1
=8/13
c.157.199-56.199-199
=199.(157-56-1)
=199.100
19900
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\(\dfrac{16}{21}\) + \(\dfrac{6}{7}\) ; \(\dfrac{15}{22}\) x \(\dfrac{11}{35}\) ; \(\dfrac{8}{11}\) : \(\dfrac{5}{22}\) ; \(\dfrac{9}{13}\) : \(\dfrac{27}{39}\) .
`# \text {DNamNgV}`
`16/21 + 6/7`
`= 16/21 + 18/21`
`= 34/21`
__
`15/22 \times 11/35`
`= (15 \times 11)/(22 \times 35)`
`= (5 \times 3 \times 11)/(2 \times 11 \times 5 \times 7)`
`= (3 \times 1)/(2 \times 7)`
`= 3/14`
___
`8/11 \div 5/22`
`= 8/11 \times 22/5`
`= (8 \times 22)/(11 \times 5)`
`= (8 \times 11 \times 2)/(11 \times 5)`
`= (8 \times 2)/5`
`= 16/5`
___
`9/13 \div 27/39`
`= 9/13 \times 39/27`
`= 9/13 \times 13/9`
`= 1`
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thực hiện phép tính(tính nhanh nếu có thể):
a)2/13 x 5/9+3/13 x 9/11+11/13
b)5/7 x -3/11+-5/7 x 8/11+9/7
Bài 3: Tính hoặc tính nhanh
a) 7/13 x 7/15 -5/12 x 21/39 + 49/91 x8/15
b) 45x16 - 17/28 + 45 x15
c) 16x17-5/16x16+11
d) 37x13-13/24+37x12