3/5 + 3/16 + 13/16

= 3/5 + ( 3/16 + 13/16 )

= 3/5 + 16/16

= 3/5 + 1

= 3/5 + 5/5 

= 8/5

3/5 + 3/16 + 13/16 = 3/5 + 1 = 1 \(\frac{3}{5}\)bạn nhé

nha

\(\dfrac{48}{19}\)

\(\dfrac{8}{5}\)

48/19

8/5

a ) 3/5 + 3/16 + 13/16 

= 3/5 + ( 3/16 + 13/16 ) 

= 3/5 + 16/16

= 3/5 + 1

= 3/5 + 5/5

= 8/5 

b ) 1/1 x 2 + 1/ 2 x 3 + 1/ 3 x 4

= 1 - 1/2 + 1/2 - 1/3 + 1/3 - 1/4

= 1 - 1/4

= 4/4 - 1/4

= 3/4 

a) 3/5+3/16+13/16

=3/5+16/16

=3/5+1

=3/5+5/5

=8/5

\(a,\dfrac{13}{19}+\dfrac{18}{19}+\dfrac{17}{19}=\dfrac{13+18+17}{19}=\dfrac{48}{19}\\ b,\dfrac{3}{5}+\dfrac{3}{16}+\dfrac{13}{16}=\dfrac{3}{5}+\left(\dfrac{3}{16}+\dfrac{13}{16}\right)=\dfrac{3}{5}+\dfrac{16}{16}=\dfrac{3}{5}+1=\dfrac{3}{5}+\dfrac{5}{5}=\dfrac{8}{5}\)

\(a\dfrac{13+18+17}{19}=\dfrac{48}{19}\)

\(b\dfrac{3}{5}+\dfrac{3+13}{16}=\dfrac{3}{5}+1=\dfrac{3}{5}+\dfrac{5}{5}=\dfrac{8}{5}\)

a)\(=\dfrac{16}{13}-\dfrac{3}{15}+\dfrac{6}{13}=\dfrac{22}{13}-\dfrac{3}{15}=\dfrac{96}{65}\)

b)\(=\dfrac{21}{8}-\left(\dfrac{5}{10}+\dfrac{6}{10}\right)=\dfrac{21}{8}-\dfrac{11}{10}=\dfrac{61}{40}\)

c)\(=\dfrac{27}{10}-3-\dfrac{4}{7}--\dfrac{61}{70}\)

d)\(=\dfrac{576}{702}=\dfrac{4}{5}\)

e)\(=\left(\dfrac{20}{15}-\dfrac{12}{15}\right)\times\dfrac{25}{2}=\dfrac{8}{15}\times\dfrac{25}{2}=\dfrac{20}{3}\)

f)\(=\dfrac{24}{12}-\dfrac{4}{12}-\dfrac{6}{12}-\dfrac{2}{12}-\dfrac{3}{12}=\dfrac{9}{12}=\dfrac{3}{4}\)

nhóm các phân số có mẫu giống nhau lại

\(=\frac{3}{5}+\left(\frac{6}{11}+\frac{16}{11}\right)+\left(\frac{7}{13}+\frac{19}{13}\right)\)

\(=\frac{3}{5}+\frac{22}{11}+\frac{26}{13}\)

\(=\frac{3}{5}+2+2\)

\(=\frac{3}{5}+4\)

\(=\frac{3}{5}+\frac{20}{5}\)

\(=\frac{23}{5}\)

1/ ( \(\frac{13}{2}\)+ \(\frac{14}{6}\)) - ( \(\frac{5}{15}\) + \(\frac{1}{3}\))

   = \(\frac{53}{6}\) - \(\frac{2}{3}\)

   = \(\frac{49}{6}\)

2/ \(\frac{4}{16}\)+ \(\frac{3}{4}\)+ \(\frac{4}{16}\) - \(\frac{3}{4}\)

= \(\frac{1}{2}\)

3/ ( \(\frac{35}{70}\)- \(\frac{2}{10}\)) + ( \(\frac{14}{8}\)-1)

= \(\frac{3}{10}\)+  \(\frac{3}{4}\)

= \(\frac{21}{20}\)

k cho mk nha

a,17/23 + (1 - 17/23)

= 17/23 + 6/23

= 23/23 = 1

b,17/12 + 9/7 - (2/7 + 5 /12)

= (17/12 - 5/12) + (9/7 + 2/7)

= 1+1 = 2

c, 7/13 - ( 4/7 -6/13 )

= 7/13 - 4/7+ 6/13

= (7/13 + 6/13) -4/7

= 13/13 -4/7

= 1 -4/7 = 3/7

hok tốt✍️ ✍️

a)   17/23+(1-17/23)

=17/23+1-17/23

=1

b)17/12+9/7-(2/7+5/12)

=17/12+9/7-2/7-5/12

=1+1

=2

c)

7/13-(4/7-6/13)

=7/13-4/7+6/13

=1-4/7

=3/7