一年级50以内加法减法口算混合练习题五三天天练精华版（7）带答案

24+24=44-21 =13+10 =45-32 =25+19 =42-30 =23+13 =47-13 =10+12 =43-28 =12+19=13+21 =49-18 =25+25 =47-1