( 3 целых 1/14- 2 целых 5/21)×(2.7-2.1)

Question

( 3 целых 1/14- 2 целых 5/21)×(2.7-2.1)

Answer 1

3 1\14-2 5\21=35\42
35\42×0,6=1\2

Answer 2

3 1/14-2 5/21)*(2,7-2,1)=1/2
3 1/14-2 5/21=5/6
2,7-2,1=0,6
5/6*0,6=5/6*6/10=1/2