a. (-2/3+3/7):4/5+(-1/3+4/7):4/5
= -5/21.5/4+5/21.5/4
= (-5/21+5/21).5/4
= 0.5/4
= 0
b. 5/9 : (1/11-5/22) + 5/9 : (1/15-2/3)
= 5/9 : (-3/22)+5/9:(-3/5)
= 5/9 . (-22/3)+5/9.(-5/3)
= 5/9.(-22/3-5/3)
= 5/9.-9
= -5
a. (-2/3+3/7):4/5+(-1/3+4/7):4/5
= -5/21.5/4+5/21.5/4
= (-5/21+5/21).5/4
= 0.5/4
= 0
b. 5/9 : (1/11-5/22) + 5/9 : (1/15-2/3)
= 5/9 : (-3/22)+5/9:(-3/5)
= 5/9 . (-22/3)+5/9.(-5/3)
= 5/9.(-22/3-5/3)
= 5/9.-9
= -5
tính:
a.(-2/3+3/7) : 4/5 + (-1/3+4/7) : 4/5
b. 5/9 : (1/11-5/22) + 5/9 : (1/15 - 2/3)
Help Me, Please !
a. [ -2/3 + 3/7 ] : 4/5 + [ -1/3 + 4/7 ] : 4/5
b. 5/9 : [ 1/11 - 5/22 ] + 5/9 : [ 1/15 - 2/3 ]
Giúp tui nha mọi ng
Ai làm xong sớm nhất tui tick cho
Tính hợp lí:
a.[(3/4+11/13-15/27)/(3/2+22/13-10/9)]+(1/1*2)+(1/2*3)+(1/3*4)
b.(7*12^8*5^4-6^9*20^4)/(6^10*10^5-7*3^9*80^4)
tính
a,\(6\dfrac{4}{5}-\left(1\dfrac{2}{3}+3\dfrac{4}{5}\right)\)
b,\(7\dfrac{5}{9}-\left(2\dfrac{3}{4}+3\dfrac{5}{9}\right)\)
c,\(6\dfrac{7}{7}-\left(1\dfrac{3}{4}+2\dfrac{5}{7}\right)\)
Thực hiện phép tính: a,(9/10 - 15/16) X (5/12 - 11/15 - 7/20) b,(-1)3 + (-2/3)2: 2 2/3 + 5/6 c,15 X (-1/5)2 + 1/5 - 2 X (-1/2)3 - 1/2 d,22 - (-5/7) + (1/3)4 X 36
a,1/3 -3/4 - (-3/5) + 1/72-2/9-1/36 +1/15
b, 1/5 - 3/7 + 5/9 -1/11 + 7/13 - 9/16 - 7/13 + 2/11 -5/9 + 3/7 -1/5
help me pls
Tính
1. 6/5 - 1/4 + 4/5 - 3/4
2. 7/9 - 5/12 + 2/9 - 7/12
3. -4/15 + 5/13 - 11/15 + 8/13
4. 9/15 - 7/13 +6/15 - 6/13
5. 12/5 - 3/7 + 3/5 - 4/7
6. 6/5 - 1/4 + 4/5 - 3/4 + 1/2
7. 13/7 - 8/6 + 8/7 - 4/6 - 1/3
6/5 có nghĩa là sáu phần năm đó nha mn
a.\(\left(\frac{-2}{3}+\frac{3}{7}\right):\frac{4}{5}+\left(\frac{-1}{3}+\frac{4}{7}\right):\frac{4}{5}\)
b. \(\frac{5}{9}:\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{2}{3}\right)\)
Tính giá trị biểu thức :
A = ( 3 - 1 / 4 + 2 /3 ) - ( 5 1/3 - 6/5 ) - ( 6 - 7/4 + 3 /2 )
B = 1 / 3 - 3 / 4 - ( -3/ 5 ) + 1 /64 - 2 / 9 - 1 /36 + 1 / 15
C = 1 / 3 - 3 / 5 + 5/7 - 7/ 9 + 9 /11 - 11 / 13 + 13 / 15 + 11/ 13 - 9 /11 + 7 / 9
D = 1/99 - 1 /99 x 98 - 1 / 98 x 97 - 1 /97 x 96 - ........ - 1 / 3x 2 - 1/ 2 x 1