1、练一练: 先说出运算顺序,再计算
=169.77+94.3-4.309 =264.07-4.309 =259.761
=9.26- 〔8.9-5.26 〕 =9.26-3.64 =5.62
=28.03-9.125+14.75 =18.905+14.75 =33.655
=32.5-11.2+8.25 =21.3+8.25 =29.55
