(6 7/12-3 17/36)*2,5-4 1/3:0,65= 2/3
1) 6 7/12-3 17/36= 6 21/36-3 17/36= 3 1/9
2) 3 1/9*2,5= 28/9*5/2= 70/9= 7 1/3
3) 4 1/3:0,65= 13/3*20/13= 20/3= 6 2/3
4) 7 1/3-6 2/3= 22/3-20/3= 2/3
1.5+6 =11 3.7+7 =14 4.8+7=15 6.18 7.6+6-1=11 9.1+9 10.16 12.13 14.7+5=12 15.6+4=10 17.12 18.11
..................8 6 5 4 3 2 4 6 8 5