A = \(\left(\frac{2}{8}+\frac{-1}{4}+\frac{5}{12}\right):\frac{7}{8}\)
A = \(\frac{13}{24}:\frac{7}{8}\)
A = \(\frac{13}{24}.\frac{8}{7}\)
A = \(\frac{13.1}{3.7}\)
A = \(\frac{13}{21}\)
K MK HẾT ÂM NHA M.N
A = \(\left(\frac{2}{8}+\frac{-1}{4}+\frac{5}{12}\right):\frac{7}{8}\)
A = \(\frac{13}{24}:\frac{7}{8}\)
A = \(\frac{13}{24}.\frac{8}{7}\)
A = \(\frac{13.1}{3.7}\)
A = \(\frac{13}{21}\)
K MK HẾT ÂM NHA M.N
1.tính A.-5/8-7/-12 B.3/4+(-5)/6-11/-12 C.1/6-1/36 D.15/48-(-5)/12 E.-1/7-1/8 F.-5/15-(-3)/25 G.3/4-(-5)/12-7/-24
tính :
a) 4/5 + 2/3 + 1/9
b) 3/7 + 11/14 + 19/28
c) 1/2 + 1/7 + -1/5
d) 7/8 + 5/16 + -3/4
e) 1/4 + 5/12 + -1/13
g) 2/3 + 3/8 + -5/12
a.1/7.-3/8+-13/8
b.3/5.13/40-1/10.16/23
c.(-3/4+2/5):3/7+(3/5+1/4):3/7
d.7/8:(2/9-1/8)+7/8:(1/6-5/12)
e.(-2/3+3/7):4/5+(-1/3+4/7):4/5
Giúp mình với..
a, 2/9 - 7/9 x X = 1/3
b, 4/5 + 5/7 : X = 1/6
c,1/3 + 3/8 - 7/12
d, 3/14 + 5/8 - 1/2
e,1/4 - 2/3 - 11/8
g,1/4 + 5/12 - 1/13 - 7/8
giúp mình với mình cần gấp
a. ( 19 5/8 : 7/12 - 13 1/4 : 7/12) . 4/5
b.( - 2/5 + 3/7) - (4/9 + 12/20 - 13/35) + 7/35
c. ( 4 5/57 - 3/ 4/51 + 8 13/29) - ( 3 5/57 - 6 16/29)
lam ho 1)A) 1- (5va4/9 +X -7va 7/18): 15va3/4=0
; B)X +1/2+1/4+1/8+1/16+1/32+1/64+1/128
---------------------------------------------------------- =9/2
1/3*4+1/4*5+1/5*6+1/6*7+1/7*8+1/8*9
2)
a)A=
5+8/17 +8/37
------------------
4+4/17+4/37
B)B=7/12+7/6+7/12+...+7/9900
tính :
a, 7/4 + 5/-6+21/8
b,4/9+ (-7)/12 +8/15
c,-1/3 + 2 5/6 + 19/12
giúp mình với
1) so sánh phân số
a) -8/12 và -3/-4 b)-56 /24 và 7/3 c) -4/25 và 15/-13
2) tính
a) 3/5 x 20/ -9
b)4/15 + -3/2 +8/-5
c) 19/35 x -38/7
d) -7/12 x 13/14 +1/14 x (-7) /12
Bài 1: Tìm x:a) x - 2 + 7 = 1 . 3 . -9 b) 4 . x - 1 = (-5) 5 12 2 4 16 9 2 9c) -2 . x + 5 = 7 d) 2 . x : 7 . 1 = 29 3 8 12 5 3 8 15Bài 2: Tính:a) 2 + 1 . 4 b) 0,8 : [ 4 . 1,25] - [ 0,64 - 1 ] 5 7 5 25--------------------- 8 - 1 : 3 2 5 c) 8 : [ 7 - 12 ] d) ( 1,08 - 2 ) : 4 + ( 59 - 13 ). 36 9 2 7 25 7 9 4 17----------------------- [ 5 - 1 ] : 4
Tìm x biết :
1/-5 +(-3+12-x)=7-(2-8)
2/8-(7-x+3)=-|-7+2|-(-9)
3/-(12-5+9-x)=3-|5-8+2|
4/-(-3-x+8)-(-3+5)=|5-8|
5/-|5-8|-(4-x+5)=4+|3-9|