50以内加减法
20+19= 11+19= 11+34= 10+29= 10+36= 1+16= 1+36= 1+44= 49-8= 48-17= 25+19= 28+20= 39-18= 40-17= 25+24= 48-19= 19+22= 37+11= 29-14= 44-20= 38+12= 49-9= 12+6= 23+5= 18-2= 30-2= 20-9= 40+6= 63+3= 53-3= 26-5= 18-4= 50-5= 50-6= 38-4= 33+10= 15-3= 3 3+4= 3 9-3= 39+10= 47-8=
20+19= 48-11= 29-7= 37+1= 30+8= 72-2= 43+5= 42+7= 34-2= 40+8= 34+4= 36+10= 36+3= 11+9= 25+7= 10+8= 30-3= 25+4= 48-30= 36+10= 42-4= 41+7= 32+10= 33+2= 29-3= 43+1= 36-4= 35+2= 39-5= 50-4= 50-7= 35-10= 23-3= 18+30= 80-3= 32-2= 36+20= 32+6= 43+5= 95-40= 10+30= 43-8= 38+6= 3+40= 3+30= 38-3= 16+2= 39-2= 39-4= 5+12= 11+2= 32+4= 41+9= 41+5= 28-7= 45-4= 83+5=
44+6= 29-7= 37+10=
11-2= 28-9= 48-9=
22+3= 6+24= 15+4= 15-4= 20+3= 8+50= 50-5= 22+22= 2+30= 31+9= 21+5= 47-10= 34+3= 35+3= 35+2= 40+8=
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