青青与东东各自绕操场跑一圈,青青用了1分5秒,东东用了55秒,谁跑得快?快多少秒?
直接写出结果×4﹦ ×﹦ 12÷﹦ ÷﹦ 12+﹦÷﹦ ÷6﹦ 9÷﹦ ×﹦ 12×﹦
直接写出得数.×= 1÷= ×= 77:63=÷9= ×= ÷8= 4:2.5=×=
×= 0×= ÷= = = =
直接写出得数×3= ×16= ×= (+)×4=×+×= += ÷3= 4÷=
= = = == = = == = = == = = =