5/ (-199) + (-200) + (-201)
6/ 19 - [179 - ( 24. 10 - 24 . 5)]
7/ (42 - 69 + 17) - (42 + 17)
nhanh giúp e cần gấp camonn ạaa
nhanhh ạ giúp e vssss
B= (-359)+181-123+350-172 C= -69+53+46-94-14+78 D= -199+(-200)-201 F= (-2)+4-6+8-10+12 G= (42-69+17)-(42+17)
D=(-199-201)-200=-400-200=-600
g) (15 + 37) + (52 – 37 – 17) h) (38 – 42 +14) - (38 – 42 - 15) i) (27 + 65 ) + (346 - 27- 65) k) - (27 + 65) - (346 – 27 - 65) l) (42 – 69 + 17) - (42 + 17) m) 24. (16 - 5) – 16. (24 – 5 ) n) (-12). 47 – 12 . 52 + (-12) p) 51 . (69 - 25) – 69. (51 - 25) |
g) (15 + 37) + (52 – 37 – 17) = 15 + 37 + 52 – 37 – 17 = 15 + 52 – 17 = 50 h) (38 – 42 +14) - (38 – 42 - 15) = 38 – 42 +14 - 38 + 42 + 15 = 14 + 15 = 29 i) (27 + 65 ) + (346 - 27- 65) = 27 + 65 + 346 - 27- 65 = 346 k) - (27 + 65) - (346 – 27 - 65) = -27 - 65 - 346 + 27 + 65 = -346 l) (42 – 69 + 17) - (42 + 17) = 42 – 69 + 17 - 42 - 17 = – 69 m) 24. (16 - 5) – 16. (24 – 5 ) = 24. 16 - 24 . 5 - 16 . 24 + 16. 5 = - 24 . 5 + 16. 5 = -8 . 5 = -40 n) (-12). 47 – 12 . 52 + (-12) = -12 (47 - 52 + 1) = -12 . (-4) = 48 p) 51 . (69 - 25) – 69. (51 - 25) = 51 . 69 - 51 . 25 – 69. 51 + 69. 25 = - 51 . 25 + 69. 25 = (- 51+ 69).25 = 450 |
ai Giúp em nhanh vs ạ anh đang rất cần gấp để nộp cho thầy ko là bị 0điểm giúp e vs ạ
Tìm x,y biết
a) (3x+6)+(7y-14)=0
b) 17y+35+4x+17=42
`# \text {Kaizu DN}`
`a)`
`(3x + 6) + (7x - 14) = 0?`
\(\Rightarrow3x+6+7x-14=0\\ \Rightarrow\left(3x+7x\right)+\left(6-14\right)=0\\ \Rightarrow10x-8=0\\ \Rightarrow10x=8\Rightarrow x=\dfrac{8}{10}\\ \Rightarrow x=\dfrac{4}{5}\)
Vậy, \(x=\dfrac{4}{5}\)
`b)`
`17y + 35 + 4x + 17 = 42`
\(\Rightarrow\left(17y+17\right)+\left(35+4x\right)=42\\ \Rightarrow17\left(y+1\right)+\left(35+4x\right)=42\)
Bạn xem lại đề ;-;.
a,-8/3+7/5+-71/15<x<-13/7+19/14+-7/2
b,-19/6+-15/2+11/3<x<-5/4+19/12+-10/3
c,-6/7+3/35<x<-2/5+3/7
d,x=3/4+1/-12
e,x/14=1/7+-3/14
f,11/18+13/6=85/x
g,8/17+5/17<x/17<6/17+9/17
mong các bn giúp đỡ mk vs mk cần rát gấp
ai nhanh giúp mk thì mk tick cho 3 tick mk thề có lòng tự trọng
ai lm nhanh mk cho 10 tick lun nhanh nha đang cần gấp
các bn lm đến đâu cx dc miễn là lm hộ mk cái ạ, ai đang lm vào nhắn tin vs mk để mk bít nha
a; \(-\dfrac{8}{3}+\dfrac{7}{5}-\dfrac{71}{15}< x< -\dfrac{13}{7}+\dfrac{19}{14}-\dfrac{7}{2}\)
-\(\dfrac{19}{15}\) - \(\dfrac{71}{15}\) < \(x\) < -\(\dfrac{1}{2}\) - \(\dfrac{7}{2}\)
-6 < \(x\) < -4
vì \(x\) \(\in\) Z nên \(x\) = -5
- \(\dfrac{19}{6}+\dfrac{-15}{2}+\dfrac{11}{3}\) < \(x\) < - \(\dfrac{5}{4}\) + \(\dfrac{19}{12}\) - \(\dfrac{10}{3}\)
- \(\dfrac{32}{3}+\dfrac{11}{3}< x< \) \(\dfrac{1}{3}\) - \(\dfrac{10}{3}\)
-7 < \(x\) < - 3
Vì \(x\in\) Z nên \(x\in\) {-6;-5;-4}
Tính nhanh
24.(16-5) +16.(24-5)
b) 31.(-18) +31.(-81) - 31
c) 13.(23+22) -3 . (17+ 28)
d) 11/53+(32/47+-10/53)+-64/94+1/-53+1/3
e) (-1+45/115+47/51)+(-9/23+-1/3)
f) -13/15+(-4/5+7/18)+-5/12+1/16
Ai giúp mk vs ạ cảm ơn nhiều ạ ( mk cần nộp gấp ạ)
1. 160:{|-17|+[3^2.5-(14+2^11:2^8]}
2. 16.(38-2)-38.(16-1)
3. |-6|+(-7)+|-4|+(-3)
4. 26.(-125)-125.(-36)
5. 5^6:5^3-5^0.5^1.5^2
6. 125.(-24)+24.225
7. 21.135+21.65-200
8. 42+(-19)+58-(-19)
9. 100:{31-[24:(18-7.2)]}
10. 2^3.5-3^2.4+4.6
đăng ít thôi bạn đăng nhiều thế mới nhìn vào đã thấy chóng mặt huống chi là giải
2: \(=16\cdot38-16\cdot2-38\cdot16+38=-32+38=6\)
3: \(=6-7+4-3=10-10=0\)
4: \(=-125\left(26-36\right)=-125\cdot\left(-10\right)=1250\)
5: \(=5^3-5^3=0\)
6: \(=24\left(-125+225\right)=100\cdot24=2400\)
7: =21(135+65)-200
=200*21-200
=200*20=4000
8: =42+58-19+19=100
ai Giúp em câu này nhanh với ạ
a) (3x+6)+(7y-14)=0
b) 17y+35+4x+17=42
e cảm ơn ạ
1 tính
a,( 17/20+19/21). 31/20 (17/20+19/21). (-31/20)
b, 3/4.15/2+15/8.(-3) + 199/200
c, (199/200+201/202+2015/2014). (1/2+2/3+ -7/6)
d, a(b+1/5) -a ( 6/5 + b ) với a= 2015/2015 ; b= 2000
bài 2: tính nhanh :
a) 3/8 + 7/12 + 10/16 + 10/24 b) 4/6 + 7/13 + 17/9 + 19/13 + 1/9 + 14/6
c) 1/2 + 1/6 + 1/12 + 1/20 + 1/30 + 1/42 + 1/56
a) \(\dfrac{3}{8}+\dfrac{7}{12}+\dfrac{10}{16}+\dfrac{10}{24}\)
\(=\dfrac{3}{8}+\dfrac{7}{12}+\dfrac{5}{8}+\dfrac{5}{12}\)
\(=\left(\dfrac{3}{8}+\dfrac{5}{8}\right)+\left(\dfrac{7}{12}+\dfrac{5}{12}\right)\)
\(=1+1\)
\(=2\)
b) \(\dfrac{4}{6}+\dfrac{7}{13}+\dfrac{17}{9}+\dfrac{19}{13}+\dfrac{1}{9}+\dfrac{14}{6}\)
\(=\dfrac{2}{3}+\dfrac{7}{13}+\dfrac{17}{9}+\dfrac{19}{13}+\dfrac{1}{9}+\dfrac{7}{3}\)
\(=\left(\dfrac{2}{3}+\dfrac{7}{3}\right)+\left(\dfrac{7}{13}+\dfrac{19}{13}\right)+\left(\dfrac{17}{9}+\dfrac{1}{9}\right)\)
\(=3+2+2\)
\(=7\)
c) \(\dfrac{1}{2}+\dfrac{1}{6}+\dfrac{1}{12}+\dfrac{1}{20}+\dfrac{1}{30}+\dfrac{1}{42}+\dfrac{1}{56}\)
\(=\dfrac{1}{1\cdot2}+\dfrac{1}{2\cdot3}+\dfrac{1}{3\cdot4}+\dfrac{1}{4\cdot5}+\dfrac{1}{5\cdot6}+\dfrac{1}{6\cdot7}\)
\(=1-\dfrac{1}{2}+\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{3}-\dfrac{1}{4}+\dfrac{1}{4}-\dfrac{1}{5}+\dfrac{1}{5}-\dfrac{1}{6}+\dfrac{1}{6}-\dfrac{1}{7}\)
\(=1-\dfrac{1}{7}\)
\(=\dfrac{6}{7}\)