两位数减一位数、整十数,15 + 3 =,15+30=,22+40 =,22+4 =,31 + 6 =,31+60=,52+40=,52+4=,77+20=,77+2=,52+1=,52+10=,45 + 4 =,45+40=,52+40 =,52+4 =,21 + 6 =,21+60=,32+40=,32+4=,17+20=,17+2=,58+1=,58+10=,42+5=,42+50=,82+1=,82+10=,新知识,35 - 2 = ？,5 - 2 = 3,5,2,33,35 - 20 = ？,30 - 20 = 10,3,2,15,比一比,35-2=32 35-20=15,计算,36,72,54,27,63,18,填表,63,72,4,60,9,44,32,25,解决问题1,43-20=23（个）,解决问题2,39-20-1=18（个）,58元,20元,10 元,
