− = + − = + =A, TA CÓ

60 : 31.37 37.43 43.61 61.67

 

1001 13 7 11

HD:

− = + − = + =

a, Ta có : 24.47 23 47 23 1 ( ) 23 47.23 24

24 47.23 47.23 24 47.23 24 1

+ + +

 + − + − 

1 1 1 1

 

3 1 7 11 1001 13 3 3 1

  = = = =

A

1 1 1 1 9 9 3

9 1 7 11 1001 13

b, Ta có :

2 2 25 8 25 71

3 3. 3 36 3 36 36

TS = + − = − =

   

7 35 6 6 18 6

7 5.7 5.7 3.5.7 5.7

=     + + +    