Question

 

 

Tính bằng cách thuận tiện nhất

5/12 x 2/3 + 2/3 x 7/12 + 1/3

Giúp mk nhé !!!!

 

 

Answer 1

=(5/12+7/12)+(2/3+1/3)+2/3

=1+1+2/3

=2+2/3

=2va2/3

Answer 2

=2/3 x (5/12+7/12) +1/3

=2/3 x 1 +1/3

=2/3+1/3

=1

Answer 3

=2/3 x (5/12 + 7/12) +1/3

=2/3 x 12/12 +1/3

=2/3 x 1 + 1/3

=2/3 + 1/3

=3/3 = 1

Answer 4

=2/3x(5/12+7/12)+1/3

=2/3x1+1/3

2/3+1/3

=1