I=4/3+4/15+... +4/255
K=1/3×4+2/4×6+... +7/24×31
Tính :
2/5 + 11/15 =
7/8 - 7/9 =
11/13 x 26/31 =
16/24 : 4 =
30 : 6/5 =
9/16 : 4 =
1/2 : 1/3 x 8/15 =
\(\dfrac{2}{5}+\dfrac{11}{15}=\dfrac{6}{15}+\dfrac{11}{15}=\dfrac{17}{15}\)
\(\dfrac{7}{8}-\dfrac{7}{9}=\dfrac{63}{72}-\dfrac{56}{72}=\dfrac{7}{72}\)
\(\dfrac{11}{13}\times\dfrac{26}{31}=\dfrac{22}{31}\)
\(\dfrac{16}{24}:4=\dfrac{16}{24}\times\dfrac{1}{4}=\dfrac{4}{24}=\dfrac{1}{6}\)
\(30:\dfrac{6}{5}=30\times\dfrac{5}{6}=25\)
\(\dfrac{9}{16}:4=\dfrac{9}{16}\times\dfrac{1}{4}=\dfrac{9}{64}\)
\(\dfrac{1}{2}:\dfrac{1}{3}\times\dfrac{8}{15}=\dfrac{1}{2}\times3\times\dfrac{8}{15}=\dfrac{4}{5}\)
2/5 + 11/15 = 17/15
7/8 - 7/9 = 7/72
11/13 x 26/31 = 22/31
16/24 : 4 = 1/6
30 : 6/5 = 25
9/16 : 4 = 9/64
1/2 : 1/3 x 8/15 = 3/2 x 8/15 = 4/5
tính
a) ( -5/24+0.75+7/12) : ( -2 1/4)
b) 2/3+1/3 x ( -2/3+5/6):2/3
c) 1/4+3/4 x ( 1/2+2/3)
d) 2/3+1/3 x ( -4/9+5/6): 7/12
e) ( 3 1/3 + 2,5):( 3 1/6 - 4 1/5) - 11/31
f) 2/7+28/27:(- 4/9 )
g) ( 4/15 + 7/12 - 19/20) x 2,5 + 0,25
i) ( 3/8 + -3/4 + 7/12):5/6+1/2
số 1 1/5 là hỗn số nhé
các bn giải hộ mình nha ngày kia mình phải nộp rồi
DÀI QUÁ BẠN Ạ,LÀM ƠN "T I C K" CHO MIK CÁI, THANKS BẠN!
bn ơi ko thì bn làm từng phép một cũng đc nhé các bn giải hộ mình mai mình phải nộp rồi
bài 1 tính nhanh
(-5)*(36-16)+6*(-14-6)
(-4)*(26-6)+31*(-7-13)
(-18)*(55-24)-28*(44-68)
217*(-46)-(-217)*(-15)-217*40+217
(-1)*(-2)*(-3)*(-4)*............*(-10)
(-5)^2+(-3)^3-(-10)^4
bài 2 tìm x thuộc tập hợp số nguyên
3*(x-2)= -15
(3x-6)*10= -50
(-8)*(7-x) =56
bài 2
3*(x-2)=-15
x-2=-15:3
x-2=-5
x =-5+2
x =-3
CÒN LẠI MẤY BÀ KIA BẠ LÀM TƯƠNG TỰ NHƯ THÉ NHÉ
tìm x thuộc Z
a) 1/3 + (-2)/5 + 1/6 + (-1)/5 < x < ( -3)/4 + 2/7 + (-1)/4 + 3/5 + 5/7
b) 5/17 + (-4)/9 + (-20)/31 + 12/17 + (-11)/31 < x/9 < (-3)/7 + 7/15 + 4/(-7) + 8/15 +2/3
bài 1
4/7+4
3+6/11
3-5/7
21/9-2
15/24+2
63/45-20/25
3/4-2/8
6/7-5/8
37/45-5/9
46/39-11/13
5/12+3/4+1/3
1/2+3/7+11/14
7/10-(1/5+1/4)
15/4-2/3-3/4
`4/7+4`
`=4/7+4/1`
`=4/7+28/7`
`=32/7`
__
`3+6/11`
`=33/11+6/11`
`=39/11`
__
`3-5/7`
`=3/1-5/7`
`=21/7-5/7`
`=16/7`
__
`21/9-2`
`=21/9-18/9`
`=3/9`
`=1/3`
__
`15/24+2`
`=15/24+48/24`
`=63/24`
`=21/16`
__
`63/45-20/25`
`=63/45-4/5`
`=63/45-36/45`
`=27/45`
`=9/15`
__
`3/4-2/8`
`=3/4-1/4`
`=2/4`
__
`6/7-5/8`
`=48/56-35/56`
`=13/56`
__
`37/45-5/9`
`=37/45-25/45`
`=12/45`
`=4/15`
__
`46/39-11/13`
`=46/39-33/39`
`=13/39`
`=1/2`
__
`5/12+3/4+1/3`
`=5/12+9/12+4/12`
`=14/12+4/12`
`=18/12`
`=3/2`
__
`1/2+3/7+11/14`
`=7/14+6/14+11/14`
`=13/14+11/14`
`=24/14`
`=12/7`
__
`7/10-(1/5+1/4)`
`=7/10-(4/20+5/20)`
`=7/10-9/20`
`=14/20-9/20`
`=5/20`
`=1/4`
__
`15/4-2/3-3/4`
`=(15/4-3/4)-2/3`
`=12/4-2/3`
`=3-2/3`
`=9/3-2/3`
`=7/3`
a)16/9+3/5
b)4/13--12/7
c)-3/2+4/5
d)3/-4-1/4
e)-1/5.5/7
f)7/8.64/49
g)3/4:15/24
h)5/6:(4/3+3/4)
i)1/2-(1/3+2/3)
k)4/9+1/2.2/3
l)1/2+3/4-(3/4-4/5)
giải nhanh giúp mik vs nha do mình đang cần gấp
a\()\) 16/9 +3/5
=107/45
b\()\) 4/13--2/17
=51/221--26/221
=77/221
c\()\) -3/2+4/5
=-15/10+8/10
=-7/10
d\()\) 3/-4-1/4
=-1
e\()\) -1/5.5/7
=-1/7
f\()\) 7/8.64/49
=8/7
g\()\) 3/4.15/24
=15/32
a, 1/3 + -2/5 + 1/6 + -1/5 < hoặc bằng x < -3/4 + 2/7 +3/5 +5/7 + -1/4
b, 5/17 + -4/9 +-20/31 + 12/17 + -11/31 < x < hoặc bằng -3/7 + 7/15 + 4/-7 + 8/15 + 2/3
Giúp hộ mk cần gấp! Cảm ơn nha !
\(-\frac{1}{10}< =x< =\frac{3}{5}\)
\(\frac{-4}{9}< x< =\frac{2}{3}\)
Đoàn Thị Thanh Ngân viết lời giải hộ thanks
bn tính từng vế thì thành như thế mà
Bài5:Tính
a,2/3 + 1/6 - 5/12,1/4+1/2-1/8
b,1/4+1/2-1/8
c,5/8+3/4×1/2
d,1/4+7/24×3/12
e,5/6×3/4:15/24+1/2,14/15:10/12×5/7+1/3
1.Tìm các số nguyên x:
5/17+-4/9+-20/31+12/17+-11/31<x<=-3/7+7/15+4/-7+8/15+2/3
2. Tính
A=5-10/19+15/143-5/81+8-16/26+24/243-8/181
6-12/19+18/143-6/81+9-18/26+27/243-9/181