50 以内加减法练习25+19= 48-19= 22+11= 49-9= 20+19= 1+16= 40+3= 36+8= 38-14= 28+20= 19+22= 38+12= 48-11= 11+19= 1+36= 40+9= 34+11= 34+9= 39-18= 37+11= 20+19= 32+10= 11+34= 1+44= 43-21= 36-18= 34-7= 40-17= 29-14= 41+7= 3+40= 10+29= 49-8= 44-17= 36+6= 34+11= 25+24= 44-20= 38+6= 6+24= 10+36= 48-17= 40+2= 37+9= 34+4=
