1)(6 1/8-1,75)/(9-2,2×(5 6/11-3,5)
1.6 1/8=6,125
2.6,125-1,75=4,375
3.5 6/11=5,5
4.5,5-3,5=2
5.9-2,2=19,8
6.19,8×2=39,6
7.4,375/39,6=0.1
2)
1.3 5/6=5,5 ; 1 2/15=1,1
2.5,5-1,1=4,4
3.4,4×0,5=2,2
3.0,05+0,24=0,29
4.2,2+0,29=2,49
5.8,3-1,1=7,2
6.2,49×7,2=17,928
7.17,928×2=35,856