笑笑收了42个玉米,淘气收了57个玉米,笑笑比淘气少收了多少个玉米□○□=□(个)答:笑笑比淘气少收了 个玉米.
7个5相加的和是什么?
48×52=2496.
竖式计算.208×56=720×42=480×50=
同学们去动物园参观,一张门票7元,(1)买4张门票要用多少钱?(2)小兰拿出50元钱,买7张门票够吗?
计算:5×4+4= × = 6×6﹣6= × = 7+5×7= × = 9×4﹣9= × = .