1、两位数加两位数(不进位),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
2、 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,
