30+28= 36+4= 80-6= 74-9=
2×2= 3×5= 2×4+10 = 3×4-8=
25+3×4= 36+40-6= 52-30= 77-25=
( )
14-7= 50+16= 45+21= 40+20= 78-8=
61-47= 53-5= 2x5= 87+5= 56+8=
35+28+17= 55-9+7= 71-(40+3)= 64-(30-8)=
6×6= 29-6= 26+30= 3×4+20=
73-25= 5×3= 58+20= 7+20+30=
2×6= 46-7= 3×4= 2×5+45=
7×5= 56÷8= 27+9= 32-8=
81÷9= 24÷4= 3×9= 68+9=
81÷9÷3= 4×5÷5= 12÷3×7= 2×3×6=
5×4= 30+22= 25÷5= 8+62=
78-50= 24-6= 77-5= 28-8=
25+7= 3×3= 5÷5= 6×3=
6×2-7= 5×6-8= 6×3+6= 2+6+8=
45
57
39
44
47
49
28
37
41
50
38
40
42
53
26
43
46
个数段/个
人数