72/99 - 28/99 -14/99 = 30/99 = 10/33

83,45 -30,98 -42,47 = 10 

bạn

72/99 - ( 28/99 + 14/99) = 72/99 - 42/99 = 30

83,45 - 30,98 - 42,47 = 83,45 - (30,98 +  42,47)= 83.45 - 73.45 = 10

\(\frac{72}{99}-\frac{28}{99}-\frac{14}{99}=\frac{72}{99}-\left(\frac{28}{99}+\frac{14}{99}\right)=\frac{72}{99}-\frac{42}{99}=\frac{30}{99}\) 

83,45-30,98-42,47

= 83,45-( 30,98+42,47)

=83,45-73,45

=10

72/22 - 28/22 - 14/22

= 2 - 14/22

= 15/11

\(\frac{77}{22}-\frac{28}{22}-\frac{14}{22}\)

\(=\frac{77-28-14}{22}\)

\(=\frac{35}{22}\)

72/22 - 28/22 - 14/22

= 2 - 14/22

=15/11

\(\frac{72}{99}-\frac{28}{99}-\frac{14}{99}=\frac{72-28-14}{99}\)\(=\frac{30}{99}=\frac{10}{33}\)

\(\left(69,78+30,22\right)+35,97\)\(=100+35,97=135,97\)

\(83,45-\left(30,98+42,47\right)\)\(=83,45-73,45=10\)

72/99-28/99-14/99

=72/99-(28/99+14/99)

=72/99-42/99

=30/99=10/33

67,78+35,97+30,22

=(67,78+30,22)+35,97

=98+35,97

=133,97

83,45-30,98-42,47

=83,45-(30,98+42,47)

=83,45-73,45

=10

mình kick cho bạn, bạn kick cho mình

7/11+3/4+4/11+1/4

=(7/11+4/11)+(3/4+1/4)

=11/11+4/4=1+1=2

72/99-28/99-14/99

=72-28-14

    99

=30/99=10/33

Tick cho mình nha mấy bạn

A) 72/99 - 28/99 - 14/99

= 8/11 - 28/99 - 14/99

= 8/11 - (28/99 - 14/99)

= 8/11 - 14/99

=58/99

B) 83,45 - 30,98 - 42,47 

= 8345/100 - 3098/100 - 4247/100

= 1669/20 - 1549/50 - 4247/100

= (1669/20 - 1549/50) - 4247/100

= 5247/100 - 4247/100

= 10

Tick mình nha 

A) 72/99-28/99-14/99                               B)83,45-30,98-42,47

=72/99-(28/99+14/99)                               =83,45-(30,98+42,47)

=72/99-42/99                                              =83,45-73,45

=30/99=10/33                                             =10

Bạn Nguyễn Lê Mai Thảo giải sai rồi! Sai chỗ: 8/11-(28/99+14/99) chứ không phải như bạn làm đâu!

(7/11+4/11)+3/4+1

=1+3/4+1

=11/4

\(\frac{7}{11}+\frac{3}{4}+\frac{4}{11}+\frac{1}{4}=\left(\frac{7}{11}+\frac{4}{11}\right)+\left(\frac{3}{4}+\frac{1}{4}\right)=1+1=2\)

\(\frac{7}{11}\)+ \(\frac{3}{4}\) + \(\frac{4}{11}\) + \(\frac{1}{4}\)

= \(\left(\frac{7}{11}+\frac{4}{11}\right)\)+ \(\left(\frac{3}{4}+\frac{1}{4}\right)\)

= 1 + 1

= 2

\(\frac{72}{99}\)- \(\frac{28}{99}\) - \(\frac{14}{99}\)

= \(\frac{72}{99}\) - \(\left(\frac{28}{99}+\frac{14}{99}\right)\)

= \(\frac{72}{99}\) - \(\frac{42}{99}\)

= \(\frac{30}{99}\)

\(\frac{7}{11}+\frac{3}{4}+\frac{4}{11}+\frac{1}{4}\)

\(=\left(\frac{7}{11}+\frac{4}{11}\right)+\left(\frac{3}{4}+\frac{1}{4}\right)\)

\(=1+1=2\)

\(\frac{72}{99}-\frac{28}{99}-\frac{14}{99}\)

\(=\frac{72-24-14}{99}\)

\(=\frac{34}{99}\)