(+17)-(-32)-(+23)= 17+32-23=49-23=26
2. (+6)-(+12)+(8.3)-(+7.4)= 6-12+8.3-7.4=-6+0.9=-5.1
3. 1.2-2.5-3.6+4.5=4.5-2.5+1.2-3.6=3.2-3.6=-0.4
4. -7+6+9-8-5= -1+9-8-5=8-8-5=-5
5. 73-(8-9+2-5)=73-8+9-2+5=65+9-2+5=74-2+5=77
6. -16+25+16-15+4-10=-16+16+25-15+4-10=10-10+4=4
7. -5.4+0.2-0.6+0.8=-5.4-0.6+(0.2+0.8)=-6+1=-5
希望帮到您哦