=9.26-6.26+5.88+4.12 去括号=(9.26-6.26)+(5.88+4.12) 结合律简便算法=3+10=13
9.26-(6.26-5.88)+4.12=(9.26-6.26)+(5.88+4.12)=3+10=13
9.26-(6.26-5.88)+4.12=9.26-6.26+5.88+4.12=(9.26-6.26)+(5.88+4.12)=3+10=13
(9.26-6.26)+(5.88+4.12)=3+10=13