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1、20以内的进位加法,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,
2、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,
