一年级数学下册50以内的混合运算 口算练习
45+2+1= 22+7+3= 35+3+1= 22+2+3= 35+1+3= 46-7-3=
35+1-2= 25+1-1= 45+3-2= 34+1-3= 21+2-1= 42+3-3=
49+0-5=
45+2+3=
22+5-7=
10+7-6=
27+1+1=
46+0+1=
22+1+3=
30+0-8= 33+2+4= 41+2-3= 21+6-3= 42+1+2= 22+1+2= 29+2+3= 43+2-3= 32+1+4= 23+5-6= 25+0-1= 42+2+3= 43+1+2= 46+3+1= 22+4-6= 25+1+3= 34+3-2= 43+4-6= 32+3+2= 22+0+2= 43+0+3=
33+2-1= 31+3+2= 21+6-4= 45-2+5= 22+3+4= 31+3+2= 42+4+3= 24+0-3= 27+8-4= 34+3-7= 14+6-4= 34+2+0= 41+5+2= 23+2+3=