【题目】口算
57+28=________ | 32+49=________ | 83-35=________ |
60-27=________ | 300+400=________ | 500-200=________ |
180+40=________ | 90+450=________ | 260-40=________ |
320+500=________ | 370+70=________ | 610-80=________ |
【题目】口算
57+28=________ | 32+49=________ | 83-35=________ |
60-27=________ | 300+400=________ | 500-200=________ |
180+40=________ | 90+450=________ | 260-40=________ |
320+500=________ | 370+70=________ | 610-80=________ |