1.(1)C (2)A (3)B (4)B 2. =721-210 =500÷5 =257-83 =511 =100 =174 3. (24+29+28)÷9 =81÷9 =9人苏教版三年级下册数学练习与测试答案第30页 http://m.ksjqmj.com/sannianjidaan/3722.html 推荐访问