A=1
B=-3/4
C=-1139/3731
a) 1
b)-111
c)61/91
nhầm, câu c=-1139/3731; câu b=-3/4
a, \(\frac{7}{19}+\frac{12}{19}=\frac{7+12}{19}=\frac{19}{19}=1\)
b, \(\frac{-48}{96}+\frac{-37}{148}=-\frac{1}{2}-\frac{1}{4}=\frac{-2}{4}-\frac{1}{4}=\frac{-2-1}{4}=-\frac{3}{4}\)
c, \(VP=\frac{5}{13}-\frac{5}{7}-\frac{20}{41}+\frac{21}{41}=\frac{5}{13}-\frac{5}{7}+\frac{1}{41}=\frac{35-65}{91}+\frac{1}{41}\)
\(=-\frac{30}{91}+\frac{1}{41}=-\frac{1139}{3731}\)
\(a,\frac{7}{19}+\frac{12}{19}=\frac{7+12}{19}=\frac{19}{19}=1\)
\(b,\frac{-48}{96}+\frac{-37}{148}=\frac{-1}{2}+\frac{-1}{4}=\frac{-4}{8}+\frac{-2}{8}=\frac{-6}{8}=\frac{-3}{4}\)
\(c,\frac{5}{13}+\frac{-5}{7}+\frac{-20}{41}-\frac{-21}{41}\)
\(=0+\frac{1}{41}=\frac{1}{41}\)
a)7/19+12/19=7+12/19=19/19=1
b)-48/96+-37/148=-1/2+-1/4=-2/4+-1/4=-3/4
c)
a)7/19 + 12/19 = 7 + 12/19= 19/19 = 1 b)-48/96 + -37/148 = -1/2 + -1/4 = -2/4 + -1/4= -3/4 c)A=5/13 + -5/7 + -20/41 - -21/41 = -30/91 + 1 = 61/91 Ngọc chúc bn hok tốt nha / $$$
dễ ma ko biet lam
a)7/19+12/19=19/19=1
b)-48/96+37/148=(-1)/2 + 1/4 = (-1)/4
c) 5/13+ -5/7 + - 20/41 - (-20/41) = -30/91 + (-1)= (-121/91)