1) 2/5+1,83 =0.4+1.83=2.23
2)6,4-3/20 =6.4-0.15=6.25
3)4 1/9+1,8=37/9+9/5=185/45+81/45=266/45=5 41/45
1) 2/5+1,83 =0.4+1.83=2.23
2)6,4-3/20 =6.4-0.15=6.25
3)4 1/9+1,8=37/9+9/5=185/45+81/45=266/45=5 41/45