1) (1+5) ×2=12см
2) (1+6) ×2=14см
3) (3+10) ×2=26
1/5 + 2 1/6 + 1 3/10= 6/30+ 2 5/30+ 1 9/30= 3 20/30=3 2/3
1) (1+5) ×2=12см
2) (1+6) ×2=14см
3) (3+10) ×2=26
1/5 + 2 1/6 + 1 3/10= 6/30+ 2 5/30+ 1 9/30= 3 20/30=3 2/3