1. =25.63+291.7+4.37-9.3=25.63+4.37+291.7-9.3=30+282.4=312.4
2. =18/5 +6/7 +47/5 -79/5 =6/7 -14/5 =30/35 -98/35 = -68/35
3. =19/2 -241/30 -39/4 +79/15 =-1/4 -83/30 = -181/60
4. =28/3+0.35+28/3 =56/3 +0.35 =1141/60
5.= -2/7 +13/9 -22/7 =-24/7+13/9 =-125/63
6. =8.48-3.64-9.46+2.2=-2.42
7. =-15.6-3.5+16.6+9.7 =7.2
8. =-3.625+160/9-19-9-4.325 =23/3
9. =-9.25+9-10/3-2/3+5/4 =-0.25+9-4+1.25=6
10. =-0.8-3.2=4
11. =6.2+3.6-0.1-0.65=9.05
12. =-3.5+0.12-22=-25.18
13. -0.6-16/30+28/30-0.2=-0.6+4-0.2=3.2