20以内的进位加法62()4()372()31()94()8()3415255填（）:9+()=108+()=106+()=105+()=10123457+()=102+()=1089+4=1313107+6=138+3=1117+8=9+5=5+6=7+5=141511127+6=4+8=9+2=5+8=13121113口算：12+=+=+=+=4812571239121111212+=+=+=+=4812571239121111212+=+=+=+=4812571239122101212+=+=+=+=4812571239121021212+=+=+=+=481257123912931212+=+=+=+=481257123912841212+=+=+=+=481257123912751212+=+=+=+=481257123912661212+=+=+=+=48125712391212012
