\(\frac{7}{11}.\frac{8}{19}+\frac{7}{19}.\frac{3}{11}-\frac{12}{19}\)
\(=\frac{56}{209}+\frac{21}{209}-\frac{12}{19}\)
\(=\frac{7}{19}-\frac{12}{19}\)
\(=-\frac{5}{19}\)
kb vs tớ nha
và nhớ ủng hộ nữa đó
Tính hợp lí:
g) \(\dfrac{-3}{4}+\dfrac{2}{7}+\dfrac{-1}{4}+\dfrac{3}{5}+\dfrac{5}{7}\)
h) \(\dfrac{7}{19}.\dfrac{8}{11}+\dfrac{7}{19}.\dfrac{3}{11}-\dfrac{12}{19}\)
i) \(19\dfrac{5}{8}:\dfrac{7}{2013}-26\dfrac{5}{8}:\dfrac{7}{2013}\)
k) \(\dfrac{-5}{12}.\dfrac{2}{11}+\dfrac{-5}{12}.\dfrac{9}{11}+\dfrac{5}{12}\)
A= 7/19-8/11 +7/19 :3/11+12/19
thực hiện phép tính
\(\frac{7}{19}.\frac{8}{11}+\frac{7}{19}.\frac{3}{11}+\frac{12}{19}\)
tính
a, 7/-25 + -18/25 + 4/23 +5/7+19/23
b, 7/19 x 8 /11 + 7/19 x 3/11 + 12/19
c ,day la hon so nha: 8 2/7 -(3 4/7 + 4 2/7 )
d, -7/9 .3/11 + -7 /9.8/11 + 1 7/9
1) Tính nhanh
a) 7/19. 8/11 + 7/19.3/11 + 12/19
7/19 × 8/11 + 7/19× 3/11 +12/19
tính nhanh
3/11*7/19*3/11*8/19-4/19:11/3
\(E = \frac{7}{19}. \frac{8}{11} + \frac{7}{19}. \frac{3}{11} + \frac{12}{19}\)
1) Tính nhanh
a) 7/19. 8/11 + 7/19.3/11 + 12/19
/ là phần
