1. 略 2. 73 50 209 380 3.(1)600,601,602 (2)998,999,1000 (3)290,300,310 4. 980 405 5.略 6. 370,380,390,400 699,700,701,702 300,299,298,297 苏教版练习与测试小学数学二年级下册答案第19页 http://m.ksjqmj.com/ernianjidaan/4235.html 推荐访问