请展开查看知识点列表
①72+238+28
②125×48
③101×67
④37×46+46×63
⑤938-263-537
40×50= 30×20= 25×4= 0.9-0.7=
80×5-400= 36×10= 16+40= 3.8+4.2=
1- = 1+2.5=
进入组卷
1- 
= 1+2.5=