【小学精品】一年级上学期20以内加减法口算练习
[1] 17-2= [21] 17-6= [41] 7-0= [61] 3+11= [81] 16+1= [101] 17-1= [121] 0+14=[2] 3-3= [22] 2-0= [42]
【小学精品】一年级上学期20以内加减法口算练习