phân số bé hơn 1  (9 phần 12) , (14 phần 15 )

phân số bằng 1 ( 9 phần 9  , (21 phần 21)

phân số lớn hơn 1 ( 9 phần 8 ) , ( 9 phần 8 )

chúc bạn học tốt ....................................!!!

bé hơn 1 = 9/12,14/15

bằng 1 =9/9,21/21

lớn hơn 1 =9/8,5/4

chúc bạn học tốt

\(\frac{1}{2}+\frac{1}{2}=\frac{1+1}{2}=\frac{2}{2}=1\)

\(\frac{3}{4}+\frac{1}{4}=\frac{3+1}{4}=\frac{4}{4}=1\)

\(\frac{3}{9}+\frac{6}{9}=\frac{3+6}{9}=\frac{9}{9}=1\)

a, 1/2+1/2=1

b, 3/4+1/4=1

c, 3/9+6/9=1

k nha bn, ok

câu 1 a=85

câu 2\(\frac{7}{18}\)

câu 3 \(\frac{1}{18}\)

Câu 1:a=85

Câu 2:x=7/18

Câu 3:x=1/18

191/105

191/105

a/ \(\left[\frac{4}{6}+\frac{14}{6}\right]+\left[\frac{7}{13}+\frac{19}{13}\right]+\left[\frac{17}{9}+\frac{1}{9}\right]=\frac{18}{6}+\frac{26}{13}+\frac{18}{9}=3+2+2=7\)

4/6 + 7/13 + 17/9 + 19/13 + 1/9 + 14/6

= (4/6 + 14/6) + (7/13 + 19/13) + (17/9 + 1/9)

= 18/6 + 26/13 + 18/9

= 3 + 2 + 2 

=7

1/9 + 7/12 + 2/9 + 1/12 + 4/12 + 6/9

= (1/9 + 2/9 + 6/9) + (7/12 + 1/12 + 4/12)

= 9/9 + 12/12

= 1 + 1

=2

\(\frac{8}{9}+\frac{1}{9}=\frac{8+1}{9}=\frac{9}{9}=1\)

Kick mik nha , mik kick lại !!!!!!!!!!!!!!!!!!!!!!!!

\(\frac{8}{9}+\frac{1}{9}=\frac{8+1}{9}=\frac{9}{9}=1\)

ủng hộ nha

\(1-\left(\frac{12}{5}+y=\frac{8}{9}\right):\frac{16}{9}=0\)

\(1-\left(\frac{12}{5}+y-\frac{8}{9}\right)=0\times\frac{16}{9}\)

\(1-\left(\frac{12}{5}+y-\frac{8}{9}\right)=0\)

\(\frac{12}{5}+y-\frac{8}{9}=1-0\)

\(\frac{12}{5}-y+\frac{8}{9}=1\)

\(\frac{12}{5}-y=1-\frac{8}{9}\)

\(\frac{12}{5}-y=\frac{1}{9}\)

\(y=\frac{12}{5}-\frac{1}{9}\)

\(y=\frac{108}{45}-\frac{5}{45}\)

\(y=\frac{103}{45}\)

\(\frac{1}{7}+\frac{1}{8}=\frac{8}{56}+\frac{7}{56}=\frac{15}{56}\)

\(\frac{1}{8}+\frac{1}{9}=\frac{9}{72}+\frac{8}{72}=\frac{17}{72}\)

k cho mình nha

\(\frac{15}{56}\)\(\frac{17}{72}\)

a)\(\dfrac{5}{7}+\dfrac{4}{9}=\dfrac{45}{63}+\dfrac{28}{63}=\dfrac{73}{63}\) ; \(\dfrac{9}{11}+\dfrac{3}{8}=\dfrac{72}{88}+\dfrac{33}{88}=\dfrac{105}{88}\)

\(\dfrac{4}{5}-\dfrac{2}{3}=\dfrac{12}{15}-\dfrac{10}{15}=\dfrac{2}{15}\); \(\dfrac{16}{25}-\dfrac{2}{5}=\dfrac{16}{25}-\dfrac{10}{25}=\dfrac{6}{25}\)

b)\(5+\dfrac{3}{5}=\dfrac{25}{5}+\dfrac{3}{5}=\dfrac{28}{5};10-\dfrac{9}{16}=\dfrac{160}{16}-\dfrac{9}{16}=\dfrac{151}{16}\)

\(\dfrac{2}{3}-\left(\dfrac{1}{6}+\dfrac{1}{8}\right)=\dfrac{2}{3}-\left(\dfrac{8}{48}+\dfrac{6}{48}\right)=\dfrac{2}{3}-\dfrac{14}{48}=\dfrac{32}{48}-\dfrac{14}{48}=\dfrac{3}{8}\)