二年级数学(上册)口算题卡.docx

34+36=81-56=69+6=35+34=62+36=81-69=74-26=54+36=67+24=36+49=23+48=47-28=68+25=58+28=37+58=57+29=33+2+38=49+39=71+16=77+21+9=7℅7=6...