两位数加减法练习课[1].ppt

两位数加减法练习课（苏教版一年级下册）潞城中心校：罗玉洁 2013年5 月28日,1、口算。,24+32=,84-24=,45+13=,57-45=,5+44=,63-40=,24+32=,56,84-24=,60,45+13=,58,57-45=,12,5+44=,49,63-40=,23,2、笔算。,53+28=,53-28=,1,8,1,8,5,2,5,2,3、拔萝卜。,大于50,退位减,小于50,不退位减,3、拔萝卜。,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,4、水果盖住的数是几？,8,4,9,5,-,5,2,4、水果盖住的数是几？,4、水果盖住的数是几？,2,8,8,8,6,5,4、水果盖住的数是几？,4、水果盖住的数是几？,5、比比谁的得数大？,