请展开查看知识点列表
70×3= 200×5= 208×4= 198×6≈ 607×4≈
+ = ﹣ = + = ﹣ = 1﹣ =
①※467+285=
②※800-258=
③308×9=
④450×7=
⑤382×8=
进入组卷