-4/5+4/19-4/23+8/5-8/19+8/23
=-4/5+8/5+4/19-8/19-4/23+8/23
=4/5+(-4/19)-4/23
=1748+(-460)-380/2185
=908/2185
-4/5+4/19-4/23+8/5-8/19+8/23
=-4/5+8/5+4/19-8/19-4/23+8/23
=4/5+(-4/19)-4/23
=1748+(-460)-380/2185
=908/2185
\(\frac{\frac{-4}{5}+\frac{4}{19}-\frac{4}{23}}{\frac{8}{5}-\frac{8}{19}+\frac{8}{23}}\)
(-4/5+4/19-4/23)/(8/5-8/19+8/23)
A = \(\frac{\frac{-4}{9}+\frac{4}{19}-\frac{4}{23}}{\frac{8}{5}-\frac{8}{19}+\frac{8}{23}}\)
\(\frac{-4}{5}+\frac{8}{19}-\frac{4}{23}\)
\(\frac{8}{5}-\frac{8}{19}+\frac{8}{23}\)
Bài 1: tính
1, 1-5+7-8+4-1+5-7+8
2, 14-23+(5+14)-(5-23)+17
3, 12-44+9-3+14-19-9-12
4,22-(4-8+12)+(-8-12+4)
Các bạn ơi cho mình cách làm bài toán này
A) -(2/19-9/23+7/28)+(-15/38+14/23+1/4)-5/8
và bài này nữa
B) 1/15+5/19-4/3+(4/5-5/19+1/3)-5/8
Cảm ơn các bạn!!!!!!!
1) Tính giá trị các biểu thức :
a) C = 5/18 + 8/19 - 7/21 + ( -10/36 + 11/19 + 1/3) - 5/8
b) F = 15/14 - ( 17/23 - 80/87 + 5/4 ) + ( 17/23 - 15/14 + 1/4 )
c) G = 1/25 - 4/27 + ( -23/27 + -1/25 - 5/43 ) + 5/43 - 4/7
a). -(2/19-9/23+7/28)+(-15/38+14/23+1/4)-5/8
Tính giá trị biểu thức:
3) C= \(\frac{5}{18}+\frac{8}{19}-\frac{7}{21}+\left(\frac{-10}{36}+\frac{11}{19}+\frac{1}{3}\right)-\frac{5}{8}\)\(\frac{5}{8}\)
4) D= \(\frac{1}{9}-\left|\frac{-5}{23}\right|-\left(\frac{-5}{23}+\frac{1}{9}+\frac{25}{7}\right)+\frac{50}{4}-\frac{7}{30}\)