1、青蛙吃害虫,我吃了56只害虫.,我吃了30只害虫.,两只青蛙一共吃了多少只害虫?,5630= ?,50+30=80,56+30=86,5,3,86,5,5个十加3个十,6,8,大青蛙比小青蛙多吃了多少只害虫?,5,6,3,0=,?,5030=20,5630=26,26,5,6,5个十减3个十,2,你还能提出其它的数学问题吗?,98-50=,28-10,建房子,18,48,80+7=,87,35-20=,15,33+20=,53,30+5=,35,42-30=,12,61+4=,65,52-40=,12,72+7=,79,98-60=,38,61-30=,31,47-20=,27,82-70=,
2、12,56+3=,59,78-5=,73,41+7=,48,39-7=,32,65-4=,61,胜利!,208,4820,35-10,14+10,502,686,2620,8430,跷跷板,还有多少个空座位?,45,30,15,母鸡64只,公鸡30只,公鸡比母鸡少多少只?,64,30,34,(只),4220,33+60,83+6,6110,85+4,30+37,5520,38+20,45+30,50+24,计算,764,6850,685,573,7640,5730,计算,(可以用减法计算。),35 - 20 = ?,35元,我有20元,如果买一个 ,还差多少元?,46元,30元,我带了80元钱,想买这两个玩具,可以吗?,你是怎样知道的呢?,30+46=?,跳绳比赛,一共跳了多少下?,我一共跳了多少下呀?我赢了吗?,