Question

Tính các phân số sau :

1-1/12 

15 -3/4 

1-1/10

5-15/25

Answer 1

1/1 -  1/12= 12/12 - 1/12= 11/12

15/1 -  3/4= 60/4 - 3/4= 57/4

1/1 - 1/10= 10/10 - 1/10= 9/10

5/1 - 3/5= 25/5 - 3/5= 22/5

Answer 2

\(1-\dfrac{1}{12}=\dfrac{12}{12}-\dfrac{1}{12}=\dfrac{11}{12}\)

\(15-\dfrac{3}{4}=\dfrac{60}{4}-\dfrac{3}{4}=\dfrac{57}{4}\)

\(1-\dfrac{1}{10}=\dfrac{10}{10}-\dfrac{1}{10}=\dfrac{9}{10}\)

\(5-\dfrac{15}{25}=\dfrac{125}{25}-\dfrac{15}{25}=\dfrac{110}{25}=\dfrac{22}{5}\)

Answer 3

1/1-1/12=12/12-1/12=11/12

15/1-3/4=60/4-3/4=57/4

1/1-1/10=10/10-1/10=9/10

5/1-3/5=25/5-3/5=22/5

Answer 4

1/1 -  1/12= 12/12 - 1/12= 11/12

15/1 -  3/4= 60/4 - 3/4= 57/4

1/1 - 1/10= 10/10 - 1/10= 9/10

5/1 - 3/5= 25/5 - 3/5= 22/5