a) 889972 + 96308 = 986280

b) \(\dfrac{5}{6}+\dfrac{7}{12}=\dfrac{10}{12}+\dfrac{7}{12}=\dfrac{17}{12}\)

c) \(3+\dfrac{5}{7}=\dfrac{21}{7}+\dfrac{5}{7}=\dfrac{26}{7}\)

d) 926,83 + 549,67 = 1476,5

a)889972 + 96308=986280

c)3+5/7=21/7+5/7=26/7

b)5/6+7/12=10/12+7/12=17/12

d)926,83+549,67=1476,5

\(\dfrac{-3}{-5}=\dfrac{3}{5}\)

\(\dfrac{4}{6}=\dfrac{2}{3}< \dfrac{3}{2}\)

\(\dfrac{-3}{-21}=\dfrac{1}{7}>\dfrac{-1}{7}\)

\(\dfrac{-9}{6}=\dfrac{-3}{2}< \dfrac{-2}{3}\)

\(=>\) Chọn đáp án A.

5 + 6 = 11

7 + 2 = 9

9 + 7 = 16

5 + 6 = 11 

7 + 2 = 9 

9 + 7 = 16 

^^ Học tốt nhé!  

46372 + 67272 x 42 : 7 = 450 004

/HT\

TL

46372+67272x42:7=450004

nha

Không biết đúng hay sai.=)

@@@ _HT_@@@

a. [ -2/3 + 3/7 ] : 4/5 + [ -1/3 + 4/7 ]  : 4/5 = 0

b. 5/9 : [ 1/11 - 5/22 ] + 5/9 : [ 1/15 - 2/3 ] = -5

HT/nhớ k cho tôi nha

Ai làm xong sớm nhất tui k cho

nntttgfgfgt

`#lv`

`-2/5+(-7/10)-9/6`

`=-2/5-7/10-9/6`

`=-4/10-7/10-9/6`

`=-11/10-3/2`

`=-11/10-15/10`

`=-26/10`

`=-13/5`

__

`1/2+(-2/5)-(-2/3)`

`=1/2-2/5+2/3`

`=5/10-4/10+2/3`

`=1/10+2/3`

`=3/30+20/30`

`=23/30`

__

`5/3-3/4+7/6`

`=20/12-9/12+14/12`

`=11/12+14/12`

`=25/12`

__

`-1/5+5/3-3/2`

`=-3/15+25/15-3/2`

`=22/15-3/2`

`=44/30-45/30`

`=-1/30`

__

`1/4-7/8+(-9/10)`

`=2/8-7/8-9/10`

`=-5/8-9/10`

`=-25/40-36/40`

`=-61/40`

__

`5/4+1/2+(-7/12)`

`=15/12+6/12-7/12`

`=21/12-7/12`

`=14/12`

`=7/6`

__

`-5/8-1/3+(-7/6)`

`=-5/8-1/3-7/6`

`=-15/24-8/24-28/24`

`=-52/24`

`=-13/6`

__

`-3/4-7/10+(-5/6)`

`=-3/4-7/10-5/6`

`=-45/60-42/60-50/60`

`=-137/60`

Bài làm

a, (-2/5) + (-7/10) - 9/6 =(-12/30) + (-21/30) - 45/30=(-33/30) - 45/30 = (-78/30)

b,1/2 + (-2/5) - (-2/3) = 15/30 + (-12/30) - (-20/30) = 3/30 - (-20/30) = 23/30

c,5/3 - 3/4 + 7/6 = 40/24 - 18/24 + 28/24 = 22/24 + 28/24 = 50/24 = 25/12

d, (-1/5) + 5/3 - 3/2 = (-6/30) + 50/30 - 45/30 = 44/30 - 45/30 = (-1/30)

e, 1/4 - 7/8 + (-9/10) = 10/40 - 35/40 - 36/40 = (-25/40) - 36/40 = (-61/40)

f, 5/4 +1/2 + (-7/12) = 15/12 + 6/12 - 7/12 = 21/12 - 7/12 = 14/12 = 7/6

g,(-5/8) -1/3 + (-7/6) = (-15/24) - 8/24 - 28/24 = (-23/24) - 28/24 = (-51/24) 

k,(-3/4) - 7/10 + (-5/6) = (-45/60) - 42/60 - 50/60 = (-87/60) - 50/60 = (-137/60)

chúc bn học tốt nha

sai thì mn góp ý giúp mk

a) 1 969, 1 970, 1 971, 1 972, 1 973, 1 974, 1 975.

b) 2, 4, 6, 8, 10, 12, 14.

c) 1, 3, 5, 7, 9, 11, 13, 15.

d) 5, 10, 15, 20, 25, 30, 35, 40.