25.85-3.7-6.3+1.15等于17,简便运算:
=25.85+1.15-3.7+6.3
=27-10
=17
25.85-3.7-6.3+1.15=(25.85+1.15)-(3.7+6.3)=27 - 10=17
解:原式=28.85-3.7-6.3+1.15=(25.85+1.15)-(3.7+6.3)=27-10=17
25.85-3.7-6.3+1.15等于17,简便运算:=25.85-10+1.15=15.85+1.15=17