3144:524=6

8322:219=38

7560:251=30 dư 30

3144 : 524 = 6 

8322 : 219 = 38

7560 : 251 = 30 dư 30

354

71 804;2 678 418;

109 nha

6867   I   63

  15     I   102

   157  I

     41  I

1.

a) \(\frac{16}{24}-\frac{1}{3}=\frac{16}{24}-\frac{8}{24}=\)\(\frac{8}{24}=\frac{1}{3}\)

b) \(\frac{4}{5}-\frac{12}{60}=\frac{48}{60}-\frac{12}{60}=\frac{36}{60}=\frac{9}{15}\)

3.

a)\(\frac{17}{6}-\frac{2}{6}=\frac{17-2}{6}=\frac{15}{6}\)

b) \(\frac{16}{15}-\frac{11}{15}=\frac{16-11}{15}=\frac{5}{15}=\frac{1}{3}\)

c) \(\frac{19}{12}-\frac{13}{12}=\frac{19-13}{12}=\frac{6}{12}=\frac{1}{2}\)

a) 16 24 − 1 3 = 16 24 − 8 24 = 24 16 ​ − 3 1 ​ = 24 16 ​ − 24 8 ​ = 8 24 = 1 3 24 8 ​ = 3 1 ​ b) 4 5 − 12 60 = 48 60 − 12 60 = 36 60 = 9 15 5 4 ​ − 60 12 ​ = 60 48 ​ − 60 12 ​ = 60 36 ​ = 15 9 ​ 3. a) 17 6 − 2 6 = 17 − 2 6 = 15 6 6 17 ​ − 6 2 ​ = 6 17−2 ​ = 6 15 ​ b) 16 15 − 11 15 = 16 − 11 15 = 5 15 = 1 3 15 16 ​ − 15 11 ​ = 15 16−11 ​ = 15 5 ​ = 3 1 ​ c) 19 12 − 13 12 = 19 − 13 12 = 6 12 = 1 2 12 19 ​ − 12 13 ​ = 12 19−13 ​ = 12 6 ​ = 2 1 ​

a)25,54

b)2,53

c)2,38

d)40

e)5,11

g)35,6

A) Số lớn nhất là 19 917 916

B) Số bé nhất là 219 820

A) Số lớn nhất là 19 917 916

B) Số bé nhất là 219 820

\(\frac{2}{3}+\frac{3}{9}+\frac{7}{5}\)

\(=\frac{2}{3}+\frac{1}{3}+\frac{7}{5}\)

\(=\frac{10}{15}+\frac{5}{15}+\frac{21}{15}\)

\(=\frac{36}{15}\)

\(=\frac{12}{5}\)

\(\frac{2}{3}+\frac{3}{9}+\frac{7}{5}\)

=\(\frac{2}{3}+\frac{1}{3}+\frac{7}{5}\)

=\(\frac{7}{5}+\frac{2}{3}+\frac{1}{3}\)

=\(\frac{3}{3}+\frac{7}{5}\)

\(=1+\frac{7}{5}\)

=\(\frac{12}{5}\)