20以内的进位加法,执教：孟令军,4,( ),3,7,2,( ),3,1,( ),9,4,( ),8,( ),3,4,1,5,2,5,5,填（ ）:,9+( )=10 8+( )=10,6+( )=10 5+( )=10,1,2,3,4,5,7+( )=10,2+( )=10,8,9+4=13,10,7+6=13,8+3=11,1,14,15,11,12,13,12,11,13,口算：,12,+,=,+,=,+,=,+,=,4,8,12,5,7,12,3,9,12,1,11,12,12,+,=,+,=,+,=,+,=,4,8,12,5,7,12,3,9,12,11,1,12,12,+,=,+,=,+,=,+,=,4,8,12,5,7,12,3,9,12,2,10,12,12,+,=,+,=,+,=,+,=,4,8,12,5,7,12,3,9,12,10,2,12,12,+,=,+,=,+,=,+,=,4,8,12,5,7,12,3,9,12,9,3,12,12,+,=,+,=,+,=,+,=,4,8,12,5,7,12,3,9,12,8,4,12,12,+,=,+,=,+,=,+,=,4,8,12,5,7,12,3,9,12,7,5,12,12,+,=,+,=,+,=,+,=,4,8,12,5,7,12,3,9,12,6,6,12,12,+,=,+,=,+,=,+,=,4,8,12,5,7,12,3,9,12,12,0,12,