34+9= 48+6= 65-9= 79-30= 45+20= 81-80=
44+30+10=37-20+40=83-60+40=56-9+30=
31+30-9=70+(20-7)=
52-36+69=( )
52-6+37=
2×5= 72-20= 57+9= 3×5-8=
43+40= 4×3= 4×5= 70+10-4=
2×3= 62-9= 84-14= 8+18-15=
95-30= 50+26= 80-30=
62+7= 46+7= 41-2=
9+27= 20+39= 57-6=
27+6+8= 47-7+40= 40+37-9=
81-(31-21)= 70+(50-40)=
12-7= 97-50= 56+40= 62-(24+6)=
87+9= 42+20= 95-6= 40+(12-4)=
78-10= 62-5= 60+24-8= 23-(10-3)=
①47+26=
②80-17=
③29+56=
④23+47-39=
⑤85-18-29=
⑥45+17+35=
14-6= 12-4+20= 55-5= 73-70+9=
13-7= 6+50-4 = 94-90= 13-4 +30=
46+17= 81-63= 92-60+38=
( )+( )=男生和女生的总人数
14-10= 13-6= 8+8= 77-7= 12-5+7=
9+7= 16-8= 35-5= 16-7= 58-50+30=