\(\dfrac{-3}{7}+\dfrac{5}{13}-\dfrac{4}{17}+\dfrac{8}{13}+\dfrac{3}{4}\)
= \(\dfrac{-3}{7}-\dfrac{4}{17}+\dfrac{3}{4}+\dfrac{5}{13}+\dfrac{8}{13}\)
= \(\dfrac{41}{476}+1\)
= \(\dfrac{517}{476}\)
\(\dfrac{-3}{7}+\dfrac{5}{13}-\dfrac{4}{17}+\dfrac{8}{13}+\dfrac{3}{4}\)
= \(\dfrac{-3}{7}-\dfrac{4}{17}+\dfrac{3}{4}+\dfrac{5}{13}+\dfrac{8}{13}\)
= \(\dfrac{41}{476}+1\)
= \(\dfrac{517}{476}\)
mọi người ơi pls help me
1) -10/11 . 8/9 + 7/18 . 10/11 2) 12/25 . 23/7 - 12/7 . 13/25 3) 3/7 . 16/15 - 2/15 . -3/7 4) -4/13 . 5/17 + -12/13 . 4/17
Bài 1:
a,11/125-17/18-5/7+4/9+17/14
b,(7+7/5-2/3)-(4+4/5+3/8)+(3-3/5+2/3+3/8)
c,-13/25.5/32.23/-13.(-64)
Bài 2:
a,11/13-(3/42-x)=-(13/28-11/13)
b,x2/3x+5/7=3/10
c,x-21/13x+1/3=-2/3
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
Tính: 7/3*4-9/4*5+11/5*6-13/6*7+15/7*8-17/8*9+19/9*10
Tính một cách hợp lí :
a) -3/8-13/65+3/8
b) (-13/7-4/9)-(-10/7-4/9)
C) 17 1/3 x(-3/7)+3 2/3 x(-3/7)
Tính:
a) -5/7(14/5 - 7/10) : |-2/3| - 3/4(8/9 + 16/3) + 10/3(1/3 + 1/5)
b) 17/-26(1/6 - 5/3) : 17/13 - 20/3(2/5 - 1/4) + 2/3(6/5 - 9/2)
c) -8/9(9/8 - 3/2) + 5/4 : (5/2 - 15/4) - 3/4(10/9 - 8/3) : (-1/3)
d) 21/10 : (12/5 - 9/10) . (-4/7) - 3/2(1/6 - 7/12) + 1/5(3/2 - 1/4)
-3/16 + -3/8 -5/4
{-25/13}+{-9/17} +12/13+{25/17}
Bài 1: thực hiện phép tính
a, (3/8 + -3/4 + 7/12) : 5/6 + 1/2
b, -7/3. 5/9+ 4/9. (-3/7)+ 17/7
c,117/13 - (2/5 + 57/13)
d, 2/3 - 0,25 : 3/4 + 5/8 .4
Bài 2: tìm x biết
a, 2/3 x - 1/2 = 1/10
b, -2/3 -1/3 (2x -5) = 3/2
c, (3x -1) (-1/2 x + 7) =0
d, 17/2 - | 2x - 3/4 | =-7/4
e, (x + 1/25) +17/25 = 26/25
1. 15 và 3/9 - (11/13 + 7 và 3/19)
2. (17 và 29/31 - 3 và 7/8) - (2 và 28/31 - 4)
3. (-3/14 + 2/5) : 5/13 + (-11/14 +3/5) x 13/5
mik ko ghi đc hỗn số nên mik ghi "và" nha