斗半丘第1组时间：分秒自评：做对道做错道①3×4=⑧2x1=8731513-4②1⑨6×74165×18=③8-3=04④1×7=7x410126⑤3049x3=312367⑥4x2=138x1=20944÷2=1⑦12÷}=4362①4x55×16第2组时间：分秒自评...