1. 75+102+23-197-37-56= -90
2. 8.42-8.42-(3.42-3.20)-6.4= -6.62
4. 15.3-15.3+24.37-24.37-16.2+8.9= -7.3
1. 75+102+23-197-37-56= -90
2. 8.42-8.42-(3.42-3.20)-6.4= -6.62
4. 15.3-15.3+24.37-24.37-16.2+8.9= -7.3