a) 3/7+(-5/2)+(-3/5) b) (-4/3)+(-2/5)+(-3/2) c) 4/5-(-2/7)-7/10 d) 2/3-[(-7/4)-(1/2+3/8)] 01/08/2021 Bởi Piper a) 3/7+(-5/2)+(-3/5) b) (-4/3)+(-2/5)+(-3/2) c) 4/5-(-2/7)-7/10 d) 2/3-[(-7/4)-(1/2+3/8)]
a) 3/7+(-5/2)+(-3/5) = 3/7 – 5/2 -3/5 = $\frac{30-175-42}{70}$ = -187/70 b) (-4/3)+(-2/5)+(-3/2) = (-26/15) + (-3/2) = -97/30 c, 4/5-(-2/7)-7/10 =$\frac{56+20+(-49)}{70}$ =$\frac{27}{70}$ d,2/3-[(-7/4)-(1/2+3/8)] =2/3-31/8 =(-47/24) Bình luận
a) 3/7+(-5/2)+(-3/5) = 3/7 – 5/2 -3/5 = 30/70 – 175/70 – 42/70 = -187/70 b) (-4/3)+(-2/5)+(-3/2) = (-26/15) + (-3/2) = -97/30 c) 4/5-(-2/7)-7/10 = $\frac{56+20+(-49)}{70}$ = $\frac{27}{70}$ d) 2/3-[(-7/4)-(1/2+3/8)] = 2/3 – 21/8 = -47/24 Bình luận
a) 3/7+(-5/2)+(-3/5)
= 3/7 – 5/2 -3/5
= $\frac{30-175-42}{70}$
= -187/70
b) (-4/3)+(-2/5)+(-3/2)
= (-26/15) + (-3/2)
= -97/30
c, 4/5-(-2/7)-7/10
=$\frac{56+20+(-49)}{70}$
=$\frac{27}{70}$
d,2/3-[(-7/4)-(1/2+3/8)]
=2/3-31/8
=(-47/24)
a) 3/7+(-5/2)+(-3/5)
= 3/7 – 5/2 -3/5
= 30/70 – 175/70 – 42/70
= -187/70
b) (-4/3)+(-2/5)+(-3/2)
= (-26/15) + (-3/2)
= -97/30
c) 4/5-(-2/7)-7/10
= $\frac{56+20+(-49)}{70}$
= $\frac{27}{70}$
d) 2/3-[(-7/4)-(1/2+3/8)]
= 2/3 – 21/8
= -47/24