1/21二年级1000以内的加、减法笔算(5分钟)225+214=521+26=97+535=362-138=479-254=450-242=198+157=283+76=349+231=400-206=574-390=56+238=679-497=835-209=374+226=39+57=666+286=702-173=575+322=85-39=806+95=145-68=548+452=85+263=293-56=560+380=725-388=292-187=366+207=900-405=629+240=927-254=628-255=538+71=417-223=854-592=437+142=293-156=53+829=421-348=666+286=702-173=575+322=806+95=245-168=293-56=560+380=725-388=292-187=366+207=900-405=225+214=97+535=362-138=479-254=2/21二年级1000以内的加、减法(5分钟)223+404=85+37=602-336=300-185=900-461=319+250=326+588=800-695=663+282=459-68=208-129=239+571=165+78=755+155=556-379=503+108=702-564=205+89=409+394=340-153=745-679=549+867=528-89=301-84=726+598=500-453=501+389=963-804=169+450=800-695=34+678=517-348=405-228=746+163=737-520=352+135=67+95=43+88=474+209=800-507=450-242=392-157=283-1