`(-3/4)^2 : (-1/4)^2 + (2^40 . 3^38)/(8^13 . 9^15)`
`= ((-3)/4 : (-1)/4)^2 + (2^40 . 3^38)/((2^3)^13 .(3^2)^15)`
`= 3^2 + (2^40 . 3^38)/(2^39 . 3^30)`
`= 9 + 2 . 3^8`
`= 9 + 2 . 6561`
`= 9 + 13122`
`=13131`
A = 7/38 - 9/11 + 7/38 - 4/11 : 7/38 . 2/11
cứu
Tính
a) 2/3 -4 . (1/2 +3/4)
b) (-1/3 + 5/6) .11 7
c) -5/11 . 7/15 . 11/-5 . (-30)
d) -1/6 . -15/19 . 38/45
e) -5/9 . 3/11 + ( -13/18 . 3/11)
f) ( 2 2/15 . 9/17 . 3/32) : -3/17
tìm x biết
1) x=-1/2 + 3/4 2) x - 1/5 = 2/11 3) x - 5/6 = 16/42 + -8/56
4) x/5 = 5/6 + -19/30 5) |x| - 1/4 = 6/18 6)x = -1/2 +3/4
7) x/15 = 3/5 + -2/3 8)11/8 + 13/6 = 85/x 9) x - 7/8 = 13/12
10) x - -6/15 = 4/27 11) -\(\dfrac{-6}{12}\)+ x = 9/48 12) x - 4/6 = 5/25 + -7/15
Tính ( tính nhanh nếu có thể)
a) (1 1/4 + 3/5): -11/12 + (3/8 - 1 2/5) : -11/12
b) ( 3/8 - 1 2/5) : -11/15 + (1 1/4 + 3/5) -11/15
1) 1/3 - 5/6 + 3/2 2) 2/13 - ( 15/13 +4 - 0,5 ) 3) -( 1/9 +7/5 - 3/11) + ( -2/5 + 17/9 - 8/11 ) 4) 5,75 - 3,25 +5 5/6
Tìm x
a)x+2x+3x+4x+...+100x=-213
b)x+1/3=x-2/4
c)x-6/7+x-7/8+x-8/9=x-9/10+x-10/11
d)x+32/11+x+23/12=x+38/13+x+27/14
e)x-1/2004+x-2/2003-x-3/2002+x-4/2001
GIẢI GIÚP MÌNH NHA MÌNH ĐANG CẦN GẤP
Tinh
[ 3-(8-11)] -[-2+(-15+3)]
[1-(3/4-2/3)]-[1 .(5/3-1/4)]-[1-(4/3+3/4)]
tìm x biết:
a,2/5:(-x-1/2)=4/5
b,x+2/11+x+2/12=x+2/13+x+2/14+x+2/15
c,x+1/9+x+2/8=x+3/7+x+4/6
Giúp mk nha,mk cần gấp lắm
[-1/2-[-3/5]+[-1/9+1/71-[-2/7]+4/35-7/18
1/3-3/4-[-3/5]+1/64-2/9-1/36+1/15
-5/7-[-5/67]+13/30+1/2+[-11/6]+17/14-[-2/5]
[3-1/4+2/3]-[5-1/3-6/5]-[6-7/4+3/2]
[5+1/5-2/9]-[2-1/23-73/35+5/6]-[8+2/7-1/18]
làm giúp mình mình đang cần gấp
