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两位数加两位数(不进位),忠县实验小学：姜 涛,30+40=50+20=70+20=25+20=70+16=30+25=47+2=83+5=33+6=60+30=53+40=34+5=,70,45,49,90,70,86,88,93,90,55,39,39,72 36 50,7个十和2个一。,3个十和6个一。,5个十。,34+5=,30,4,9,39,十,个,3,4,+,5,9,3,十,个,3,4,+,5,9,5,2,十,个,3,2,+,6,8,3,十,个,3,4,+,5,8,4,32+6=,3+45=,38,48,4 7 3 5 2 1 6 5+2 1+5 0+5 8+2 3 6 8 8 0 7 7 4 8,5,8,9,3 6 6 5 5+3+4+7+2 8 4 9 7 9 6 9,1,9,3 6 6 5 5+3+4+7+2 8 4 9 7 9 6 9,1,9,3,9,3 6 6 5 5+3+4+7+2 8 4 9 7 9 6 9,1,9,3,9,2,2,3 6 6 5 5+3+4+7+2 8 4 9 7 9 6 9,1,9,3,9,2,2,4,1,3 6 6 5 5+3+4+7+2 8 4 9 7 9 6 9,1,9,3,9,2,2,4,1,23+15,45+34,33+52,24+55,21+17,73+12,1,1,2,2,3,3,1,1,2,2,3,3,
